Good morning. My name is Grace, and I'll be your conference operator today. At this time, I would like to Welcome everyone to the EMCOR Group first quarter 2022 earnings call. All lines have been placed on mute to prevent any background noise. After the speakers' remarks, there'll be a question-and-answer session. If you would like to ask a question during this time, simply press star then the number one on your telephone keypad. If you would like to withdraw your question, you may press the pound key. Mr. Brad Newman with FTI Consulting, you may begin.
Thank you, Grace, and good morning, everyone. Welcome to the EMCOR Group conference call. We are here today to discuss the company's 2022 first quarter results, which were reported this morning. I would like to turn the call over to Kevin Matz, Executive Vice President of Shared Services, who will introduce management. Kevin, please go ahead.
Thanks, Brad, and good morning, everyone. Can you even believe it's May and almost Mother's Day? As always, thank you for your interest in EMCOR, and welcome to our earnings conference call for the first quarter of 2022. For those of you who are accessing the call via the internet at our website, welcome to you as well. We hope you have arrived at the beginning of a slide presentation that will accompany our remarks today. We are on slide two. This presentation and certain discussions contain forward-looking statements that may include certain non-GAAP financial information. Page two describes in detail the forward-looking statements and the non-GAAP financial information disclosures. I encourage everyone to review both disclosures in conjunction with our discussion and accompanying slides. Slide three depicts the executives who are with me to discuss the quarter's results.
They are Tony Guzzi, Chairman, President, and Chief Executive Officer, Mark Pompa, our Executive Vice President and Chief Financial Officer, and our Executive Vice President and General Counsel, Maxine Mauricio. For call participants not accessing the conference call via the internet, this presentation, including the slides, will be archived in the investor relations section of our website under presentations. You can find us at emcorgroup.com. With that said, please let me turn the call over to Tony. Tony?
Yeah. Thanks, Kevin. I'm gonna be on pages four to six to start, and I'd like to thank all of you for joining us this morning. You know, on our February 24th, 2022, year-end call, I described the current operating environment that we've experienced in the first quarter as one of the toughest that I had seen in my career. This remained the case through the first quarter of 2022. However, at EMCOR, we do have a no-excuses culture. We have to adapt to an ever-changing operating environment. We are executing with discipline and flexibility as we navigate this challenging environment. Overall, the quarter went about as expected for us, with a little more pressure on operating income margins in our domestic construction and building service segments due to the disruptions caused by supply chain issues and the Omicron variant.
Further, the Ukraine war added another layer of uncertainty, especially with respect to energy and some raw material costs. We will cover the supply chain issues later in both mine and Mark's comments. In the quarter, we earned revenues of $2.59 billion, operating income of $100 million, and diluted earnings per share of $1.39. We had very strong organic revenue growth of 10.8% in the aggregate across our domestic segments, with our industrial segment leading the way at 32%. Our project pipeline remained strong with a good mix of projects. We saw an increase in RPOs to a record $5.95 billion versus $4.78 billion in the year-ago period.
Our combined operating income margins were 3.9%, as we fought through increased fuel costs and difficult supply chains in the quarter that disrupted many projects and prevented us from achieving our expected labor productivity. As we evaluate the quarter, I thought I would cover the business more broadly versus on a segment-by-segment basis, as many of these trends, both positive and negative, and challenges cut across our entire business. First, let me cover what I think is going well. Our end markets continue to be resilient, and we are winning work in the right places at the right prices. Again, we are winning work in the right places at the right prices. As I just mentioned, we grew RPOs 25% in the aggregate and 21% organically versus the year-ago period.
I will cover that in more detail when I review RPOs after Mark's commentary. Our industrial services segment is performing as expected and had a heck of a rebound to a more normal operating environment not seen since 2019. We are proving our resilience every day as we execute and complete work under what are difficult operating conditions. The disruption caused by the Omicron variant surge dissipated as we exited Q1. Hopefully, such disruptions caused by COVID are behind us. We are having significant success in attracting the right mix of skilled craft labor to execute our work. We kept our field leadership and labor intact. In the short run, they're the cost to us as the issues we experienced in the quarter affected labor productivity.
However, we made that decision that with our high level of RPOs and the current bidding environment, we should not reduce our key labor resources, especially our field leadership, such as our foremen. We are proactively managing our pricing and believe that we have caught up with customer pricing in our building services segment with respect to fuel and MRO, that is maintenance, repair, and other type material charges, as we exit the quarter. Our team is very good at adapting and developing contingency plans with respect to our supply chain. We've had to find workarounds as supply chain has become more volatile with respect to on-time delivery and delivering a complete order. That's what we're good at, finding solutions for difficult circumstances, and we will continue to adapt as needed. What has proven to be more challenging than we had contemplated in early 2022 are the following.
The continued rise in energy prices, especially for gasoline and diesel, leads to margin compression, and that's most notably within building service, but even more broadly, as it impacts our project pricing as we develop overhead rates. Despite the continued energy price inflation, we believe that we have, for the most part, appropriately adjusted our pricing models to reflect these costs. Supply chain challenges were worse than we expected, and it's been a difficult supply chain. It became even more challenging due to the impact that the Omicron surge and the conflict in Ukraine had on our suppliers. The Ukraine conflict has impacted not only the price of gasoline and natural gas and diesel, it has also impacted the price and availability of certain metals like nickel, which is a key component of stainless steel, and pig iron, which is a key component of cast iron pipe.
While we understand how to price and contract our work in an environment of increasing lead times and prices, we also encountered missed deliveries and incomplete shipments during the quarter. These disruptions resulted in reduced labor efficiency on certain of our projects. Such supply chain disruptions in the Omicron surge at the start of the quarter resulted in some very good project work being delayed and also prevented us from being able to close out some very successful projects. As I turn the commentary to Mark, I remain confident in our segment and subsidiary leadership and our team's skills and resourcefulness to mitigate these challenges and build on our strengths as we move forward in 2022. With that, I'll turn it over to Mark.
Thank you, Tony, and good morning to everyone participating on the call today. For those accessing this presentation via the webcast, we are now on slide seven. Over the next several slides, I will augment Tony's opening commentary and review each of our reportable segments' first quarter operating performance, as well as other key financial data derived from our consolidated financial statements included in both our earnings release announcement and Form 10-Q filed with the Securities and Exchange Commission earlier this morning. Let's expand our review of EMCOR's first quarter performance. As Tony mentioned, consolidated revenues of $2.59 billion are up $288.5 million or 12.5% over quarter one 2021.
Our first quarter results include $49.5 million of revenues attributable to businesses acquired pertaining to the period of time that such businesses were not owned by EMCOR in last year's first quarter. Acquisition revenues positively impacted each of our United States Electrical Construction and United States Building Services segments. Excluding the impact of businesses acquired, first quarter consolidated revenues increased approximately $239 million or a strong 10.4% quarter-over-quarter. Before reviewing the operating results of our individual reporting segments, I would like to highlight that each of our segments had strong revenue growth in the quarter and that our consolidated revenues of $2.59 billion represent a new first quarter record that is only eclipsed by 2021's fourth quarter, which generated the highest quarterly revenue in our long history.
Tony has previously commented on the challenging operating environment that existed during the quarter and continues to persist to some extent. One might question why am I highlighting a first quarter revenue record in light of the fact that it did not equate to record operating income or diluted earnings per share performance. The simple answer is that our business performance and growth prospects remain strong and we collectively should not lose sight of this despite the economic headwinds that are impacting us. We continue to generate strong organic revenue growth while simultaneously growing our remaining performance obligations in most of the market sectors that we serve. Although we have experienced some choppiness in our first quarter results due mostly to external factors, we have not eroded our strong foundation and currently believe we will meet our annual targets barring any worsening of the macroeconomic conditions.
With that being said, I will now cover the results of each of our reportable segments during the quarter starting with revenue. United States Electrical Construction quarter one revenues of $522 million increased $62.6 million or 13.6% from 2021's comparable quarter. Excluding incremental acquisition revenues of $34.9 million, this segment's revenues grew organically 6% quarter-over-quarter. Increased project activity within the commercial market sector, exclusive of the telecommunications submarket sector, as well as growth in each of the manufacturing, health care, and transportation market sectors were the primary contributors to this segment's quarterly revenue growth.
Offsetting these increases was a decline in revenues from the telecommunications submarket sector due to the sequencing of projects in the current year, as well as project delivery delays as our customers await the receipt of critical equipment due to supply chain disruptions. Both of these factors have resulted in a shift of project work to later in 2022. United States Mechanical Construction segment revenues of $1 billion increased $86 million or 9.4% from quarter one 2021. Revenue growth during the quarter was derived from the majority of the market sectors we serve, with the water and wastewater manufacturing and commercial market sectors experiencing the most significant period over period increases.
Revenue growth within the manufacturing market sector was concentrated in large food processing projects. While the growth in commercial market sector revenues was driven by demand from certain customers within the semiconductor, biotech, life sciences, and pharmaceutical industries. This increased activity augmented the continued demand for our fire protection services, particularly from those of our customers building out their e-commerce supply chains. Both our electrical and mechanical construction segments established new first quarter revenue records in 2022. United States Building Services segment revenues of $627.8 million increased $59.8 million or 10.5% and represents an all-time quarterly record for this segment. Excluding incremental acquisition contribution of $14.6 million, this segment's revenues increased $45.2 million or 8% organically. Revenue growth was generated within the segment's commercial site-based mechanical and government services divisions.
With respect to commercial site-based and government services, new customer additions and scope expansion with existing customers were the primary drivers of the quarterly increase in revenues. Within mechanical services, a number of trends have favorably impacted us from a revenue perspective. Notably, we have seen an increase in service repair and maintenance volumes, partially as supply chain delays have resulted in the need to extend the useful lives of HVAC equipment in instances when replacement equipment is not readily available. In addition, there continues to be high demand for our building automation and control services, with an emphasis on improving building efficiency and energy consumption, which is a priority for many of our customers in light of both increasing energy prices and a heightened focus on their environmental impact in the context of ESG.
United States Industrial Services segment revenues of $310.7 million increased $75.3 million or 32%. As I commented during our earnings calls for the second half of 2021, we had begun to see some resumption in demand for maintenance and capital spending from this segment's customer base in the back half of last year. Such demand patterns continued through the first quarter of 2022, as we executed against a more normal spring turnaround season with improved demand for both field and shop services. Unfortunately, some of the macroeconomic headwinds that have been prevalent within the broader oil and gas industry persist. With U.S. refinery utilization in excess of 90%, we're hopeful that 2022 will continue to develop favorably and that this segment's operating results will reflect that of a more normal pre-pandemic twelve-month period.
United Kingdom Building Services segment revenues of $131.5 million increased $4.8 million or 3.8% due to continued strong project volumes across their customer portfolio. Unfavorable exchange rate movements due to the weakening of the pound sterling negatively impacted this segment's quarter one 2022 revenues by $3.9 million. Please turn to slide eight. Selling, general, and administrative expenses of $252.6 million represent 9.7% of first quarter revenues and compared to $224.1 million and 9.7% of revenues in the year-ago period. SG&A for the first quarter includes approximately $5.2 millions of incremental expenses from businesses acquired, inclusive of intangible asset amortization, resulting in an organic increase in SG&A of $23.3 million.
With EMCOR's substantial revenue growth, we are adding personnel to support our back-office and contract administration functions, resulting in increases in salaries and benefits from the corresponding 2021 period. Additionally, we continue to see an increase in medical expenses as claim activity related to both routine medical visits and elective procedures continue to normalize after being suppressed during 2020 and the early part of 2021. Travel and entertainment expenses have also increased as our team resumes certain business travel, although still below pre-pandemic levels. As previously disclosed, our SG&A as a percentage of revenues was flat at 9.7% for both quarter one periods.
Reported operating income for the quarter was approximately $100 million or 3.9% of revenues and compares to operating income of $117 million or 5.1% of revenues a year ago. As a reminder, 2021's quarter one performance represented first quarter records for both operating income and operating margin. The overall decline in operating income and margin within the current quarter was due to quarter-over-quarter decreases in gross margins within each of our U.S. Electrical Construction, U.S. Mechanical Construction, and U.S. Building Services segments. These reductions offset quarterly gains in both our U.S. Industrial Services and U.K. Building Services segments. Specific quarterly operating income performance by segment is as follows. Our U.S. Electrical Construction segment operating income of $20 million decreased $20.3 million from the comparable 2021 period.
Reported operating margins of 3.8% represents a reduction from the 8.8% reported in last year's first quarter. The decrease in both operating income and operating margin is due to the reduction in both gross profit and gross profit margin previously mentioned, which was largely attributable to a change in this segment's project mix within the commercial market sector. In addition, whereas the prior year period benefited from the favorable progression on several extremely profitable projects, the current year's quarter was impacted by our customers' project schedules, which is heavily weighted towards the back half of the year. Lastly, and as previously mentioned, we experienced project delivery delays during the quarter due to supply chain difficulties impacting the receipt of equipment.
These supply chain delays not only impacted project timelines, but also led to labor productivity and efficiency challenges, which is a major contributor to the significant reduction in this segment's operating margin quarter-over-quarter. First quarter operating income of our US Mechanical Construction segment of $58.7 million represents a $4.5 million decrease from last year's quarter, and operating margin of 5.9% represents a 100-basis points reduction from the 6.9% earned a year ago. As referenced during our fourth quarter 2021 earnings call, our mechanical construction segment currently has a larger number of contracts within the manufacturing and water and wastewater market sectors, where we are either acting as construction manager or general contractor. In these cases, the percentage of our self-performed labor is less than typical, resulting in lower gross margin profile.
This segment additionally experienced labor productivity issues resulting from supply chain disruptions as well as project write-downs resulting from material price escalation, a portion for which we will seek future recovery. Operating income for U.S. Building Services is $23.9 million or 3.8% of revenues and compares to $31.1 million or 5.5% of revenues in 2021's first quarter. Given a reduction in gross profit margin within this segment, increased gross profit dollars resulting from the previously referenced revenue growth during the period was more than offset by an increase in SG&A expenses. Gross margin has declined due to a less favorable project mix within this segment's mechanical services division due to a higher percentage of fixed price capital projects, which typically have lower gross profit margins than this division's other service and repair offerings.
Further impacting gross profit margin was a shift in the portfolio of project work being performed by the segment's commercial site-based services division, including a quarter-over-quarter decline in certain add-on work, such as COVID-19 related cleaning and sanitation services, and an increase in more traditional facilities maintenance type projects. In addition, our U.S. Building Services segment experienced unabsorbed labor costs due to supply chain disruptions where project delivery either has been delayed or job site productivity and efficiency has suffered due to incomplete shipments of material or equipment. Lastly, within the quarter, escalating fuel prices have reduced profitability as such prices increased at a faster rate than the fuel surcharges to our customers, which typically can only be adjusted after we experience the underlying cost increase.
Although we were impacted in the quarter, as Tony referenced in his opening commentary, we have once again adjusted our pricing to account for these inflationary pressures. Our U.S. Industrial Services segment operating income of $13.3 million represents a $15.7 million improvement from the $2.4 million operating loss reported in 2021's first quarter. In the small victory column, this represents our industrial segment's second consecutive quarter of operating profit since reporting periods prior to the pandemic. As referenced during my revenue commentary, we experienced more normalized demand during the quarter within both this segment's field and shop services operations. Turnarounds that we had forecasted to occur largely happened on schedule, with some resulting pull-through cleaning and repair work. Operating margin was 4.3% for the first quarter of 2022.
U.K. Building Services operating income of $10.6 million or 8.1% of revenues represents an increase of $1.2 million and a 70-basis points improvement in operating margin period-over-period. This improvement was primarily from a favorable project closeout within the quarter, coupled with continued strength in the commercial market sector, inclusive of various telecommunications projects. We are now on slide nine. Additional financial items of significance for the quarter not addressed in the previous slides are as follows. Quarter one gross profit of $352.6 million is higher than the comparable prior year quarter by $11.5 million or 3.4%. However, gross margin of 13.6% is lower than the 14.8% at last year's first quarter, which set new first-quarter records for both gross profit and gross margin.
Needless to say, with our growth in revenues during the quarter, we did eclipse 2021's first quarter gross profit, and we established a new quarter one gross profit record. However, for the reasons covered in my segment operating income discussion, we are reporting a reduction in quarterly gross margin. Diluted earnings per common share in the first quarter is $1.39 as compared to $1.54 per diluted share for the prior year period. Despite the quarter-over-quarter reduction in EPS, the first quarter of 2022 represents our second-best earnings per share performance in a first quarter. Although we experienced an approximately 13% decline in quarter-over-quarter reported net income, our reduction in outstanding shares through our share repurchase program softened the earnings per share impact of such net income decrease. We are now on slide 10.
EMCOR's balance sheet maintains its strength in liquidity. Cash on hand of over $500 million has decreased by $306.8 million from year-end 2021, primarily as a result of cash used for financing activities of $193.5 million, inclusive of approximately $82 million of common stock repurchases made by us through March 31st, 2022. In addition, we utilized $95.8 million of operating cash during the quarter, partially as a result of our strong organic revenue growth during the period. Additionally, as has historically been the case, our working capital needs tend to be greater in the first quarter of each year, partially due to our funding of prior year's incentive awards.
Despite this use of cash during the first quarter, we anticipate the generation of positive operating cash flow as the year progresses. Working capital has decreased by just over $109 million, largely as a result of the decrease in cash just referenced, which was partially offset by an increase in accounts receivable given the revenue growth during the period, and a decrease in accrued payroll and benefits due to the incentive payments made during the quarter that I previously mentioned. Goodwill remains relatively consistent with that as of December 2021. Net identifiable and tangible assets have decreased by nearly $15 million during 2022 as the amortization expense taken more than offset the additional intangible assets recognized in connection with the acquisition we completed in Q1.
Total debt exclusive of operating lease liabilities remains nearly identical to that, as of December, and EMCOR's debt to capitalization ratio has increased modestly from 10.4% at year-end 2021 to 10.9% at March 31st, 2022, given the reduction in our shareholders' equity resulting from our share repurchase activity during the first quarter. As we stated before, our balance sheet, in conjunction with the borrowing capacity available to us under our credit agreement, will continue to enable us to invest in our business, return capital to shareholders and execute against our strategic objectives as we progress through 2022 and future periods.
We remain committed to our capital allocation strategy as evidenced by both our share repurchase activity to date, as well as today's announcement that our board of directors has increased the authorization under our share repurchase program. With my portion of this morning's slide presentation complete, I will now return the call to Tony. Tony?
Thanks, Mark, and we'll see you when we do questions. I'm gonna be on page 11, remaining performance obligations by segment and market sector. The first quarter was another strong booking quarter for the company. As many of you know, our business is not a quarter-to-quarter business. However, total company RPOs nonetheless have increased sequentially in eight out of the last nine quarters, despite being selective in bidding activities given the uneven economic environment. As mentioned earlier, total company RPOs at the end of the first quarter were $5.95 billion, up almost $1.2 billion or close to 25% over the March 2021 total of $4.78 billion. First quarter project bookings revenues by RPOs increasing $354 million from December 2021.
In fact, each of our segments grew RPOs in the first quarter from year-end 2021. The organic RPO growth, as I stated earlier, was a very strong 21%. The first quarter saw a strong year-over-year quarterly RPO and revenue growth. Simply stated, this is the one-two punch. Highlights both the current and future top core demand in our business. We continue to see an active bidding environment even during this time of supply chain disruptions and inflation challenges. Together, our two domestic construction segments experienced strong construction project growth in the quarter, and RPOs increased by $865 million or 22.7% from March 2021. The mechanical construction segments saw RPOs increased by $745 million or 28%, while the electrical construction segments saw an increase of $121 million or a solid 10%.
U.S. Building Services RPO levels increased $306 million or almost 45% from the year ago quarter. All three business divisions under U.S. Building Services, our commercial site-based services, government service and mobile mechanical services, saw RPO increases from the year ago quarter, with mobile mechanical services RPOs increasing $272 million. We continue to see significant opportunities to improve building wellness in the institutional and educational sectors. Moving to the right side of the page, we saw RPOs broken down by market sector. We continue to see balanced year-over-year RPO growth in every sector except in the transportation sector. Continuing a trend we saw throughout 2021, RPO growth was broad-based in the first quarter across most market sectors with commercial RPOs, including hyperscale data centers and high-tech semiconductor projects, increasing 28% year-over-year.
Our commercial RPOs total increased $582 million year-over-year and now stands at $2.7 billion, making up 45% of our total company RPOs. Finishing up on our RPO year-over-year growth, healthcare RPOs are up nicely, institutional are up, industrial and manufacturing are up, and water and wastewater are up, as well as short duration projects. From both a business segment and market perspective, I continue to like the balance and breadth of our RPOs. I'm gonna switch to page 12 cause we have used this slide to talk about the underpinnings of our business. Look, I look at this slide, and this is the table that gets set for us to execute on, and really, we're growing in every one of these areas I previously described.
We're all well-positioned in these growing non-residential markets and trades. The data center market is still very strong, and we're positioned well in the major data center geographic markets as well as type of data centers and as well as with the right customers. Although we did see project delivery slowing down almost entirely related to supply chain, that even makes the demand stronger and the need for our services stronger is that eventually this the data centers are gonna have to come online faster.
We're seeing that across our trades, electrical, mechanical, and fire protection, and we're seeing it across the regions where we are very strong, and we're very strong in this business cause we have the best labor in the market to do this business. We execute very well with the trades that we have, and we have excellent prefabrication capabilities that we are looking to grow across all three trades to support this growth. Mark talked about the fire protection growth that we've had supporting the e-commerce build-up. Again, we see no slowing of that fire protection demand, and I'm gonna segue into the industrial manufacturing, where we also see strong fire protection demand, especially it relates to two major trends, the build-out of the semiconductor plants, which we are well-positioned, both fire protection-wise, mechanically and low voltage-wise on our electrical trade, and also with respect to fire protection.
Again, we are in most of the right markets to execute these trades, and we are really busy doing that work and planning that work. Some of that work's being delayed a little bit, or the project delivery is being delayed. We're actually working on the sites because of some of the uncertainty with respect to stainless steel right now. This is a good long-term market. The other good long-term markets that are very good with respect to industrial manufacturing, as always, is food processing, where we serve as an EPC or CM in many cases, but also, beyond that, the reshoring of manufacturing. We see this as a long-term trend, especially with respect to the U.S. as the growing competition with China and all the political uncertainty there. Also, people realize now with the Omicron, it is not a dependable source of supply.
We're also seeing industrial manufacturing grow as it does with respect to growth to support electric vehicles and the build-out of not only charging stations, but the build-out of manufacturing plants to support people that are now building electric vehicles. We are well-positioned both mechanically, electrically, as well as fire protection to do that work. Healthcare continues to be a strong market for us. Healthcare can be a little episodic. We do see people seeking more flexibility with respect to their healthcare flexibility and their facility flexibility post-COVID, both in a rehab mode, what I mean by rehabbing the building, but also with respect to new construction. Water and wastewater is another strong market for us, especially in Florida. Of course, now you take those next two, they're intertwined across our business, across all market sectors.
We're seeing very strong demand for mechanical services. We wish we were getting more delivery of equipment to put it in, but when we can't, we fix it. In indoor air quality, these projects have all become melded together. You heard me talk about individual air quality projects. That's no longer what's happening. It gets presented as an overall mechanical retrofit package that drives down energy costs, but also brings in enhanced air quality into the building. This has been a transition point for many owners as outside air was previously considered not a great thing to bring into the building, but now you have to balance the introduction of outside air versus energy efficiency, which then leads to equipment replacement.
Eventually, all this will get squared away, and we'll have very strong replacement markets as we do now, and I think that's gonna continue for a while. Of course, our fire protection, we are the leading sprinkler construction contractor on a nationwide basis, and we have one heck of a service offering to do there, both on fire alarming and fire protection, led by a great team out of two of our subsidiaries in the Midwest that work nationwide, both of them. If you look at those trends and you think about the revenue growth, you look at our RPO growth, we have a pretty good table set for the long term here at EMCOR. We had some bumps in the first quarter, not totally unexpected, if you think about everything we had to contend with.
Are we pleased with our suppliers right now? Absolutely not. Is some of it their fault? No. I mean, they're having the same challenges as many people have. We could talk more in the Q&A about some of the challenges they have. We looked at that and we said, you know, you go to page 13 and 14. We came out with initial guidance at $10.4 billion-$10.7 billion of revenues and $7.15-$7.85 in earnings per diluted share. We as a team see no reason to change that based upon our Q1 results. When we set our guidance, we expected the non-residential market to grow in the low- to mid-single digits. We did expect more normalized demand from our refining and petrochemical customers, and we did expect a continued resumption in small project and service activity.
You know what? The reality of all these have proven to be true so far this year. As with prior years, I think what you're gonna hear is actually a repeat of what I said in the first quarter with some updates on it. Where you move in that guidance range depends a lot on things that we think are in our control and things that are less in our control. I don't think there's any doubt to anybody that's followed EMCOR over a long period of time that we know our costs and we know how to control our costs. It's something we're really good at. I think we're as good as anybody in our industries.
However, we do expect continuing headwinds from fuel costs and supply chain issues, both of which, as you go through the first quarter, in that first quarter, proved to be worse than we expected, coming out of the year-end, 2021. A lot of reasons for that, right? We talked about those. We're not going to go ad nauseam about Ukraine and Omicron and how that all impacts the supply chain. It was already a challenged supply chain. You know what? We got the best team. Our folks in the field know how to adapt and overcome, as does their segment leadership. The challenges are there. They know how to work through them. We'll continue to refine our process to mitigate these headwinds as best we can.
Of course, we will be very aggressive seeking entitlement where it's available, on our projects for changes. We're gonna continue to be disciplined in our estimating and pricing. As significant as our RPO growth has been through the year with a book-to-bill of over 1.1, we actually could have booked more work with a little less discipline. But we remain very disciplined because we continue to see good opportunities in all the things I talked about on page 12. We're winning work in all the right places. The table's been set. We've just got to continue to execute and get through some of the issues we've had here in the first quarter. You know, we're never gonna sacrifice safety at all levels of our organization.
Underlying, you know, where we end up in the guidance range is we expect, as Mark said, a normal operating environment through the year for our industrial services business. Sitting here today, we expect to have a normal fall turnaround season. You know, like in anything, there's a lot of things you don't completely control. You know, as much as I'd like to, and as much as our EMCOR team would love to, we don't control what happens in the supply chain to any significant way, especially as you go upstream. We faced a tough supply chain in Q1. We expect it to remain a challenge in the second quarter. This challenge specifically centers around major systems like applied HVAC, large electrical gear, panels, pumps, and generators, things like that, things that are more system related.
Now why is that even more challenged than the pipe and the commodities and the wire and the conduit? Because each of them are smart pieces of equipment, and all of them have chips. This has been the biggest issue with on-time delivery and complete delivery. Will COVID have another resurgence even beyond what we experienced in the first quarter? You know, look, none of us really have any idea of that, but what we do know is we will keep our employees as safe as possible, and we will keep our projects moving, and our services will be delivered. One of the questions we get is will customer decision-making slow down with all the uncertainties? Quite frankly, we have not seen customer decision-making slow, especially go back to page 12 on all the areas where we really are excelling right now.
We have seen some projects' delivery slowed. They have not even delayed. They slowed delivery as a result of supply chain issues around a major OEM system that we talked about. Will the Fed's announced and expected increase in interest rates slow down our customers' decision-making with respect to large capital projects? We have seen no impact to date. Again, go back to the kind of areas we're really growing in. Most of those customers are flush with cash. What will happen with inflation? I could give you an answer and say, "You tell me." To date, we have seen it is worse, not better, than at the end of 2021.
You know, as we move further into 2022, we will continue to be disciplined capital allocators in terms of our organic investments, acquisitions, and the return of cash to shareholders, all of which we believe are important uses of our capital. Year to date, we have purchased over $250 million in shares through April 28, 2022. As announced this morning, our board has approved an increase of over $200 million under our share repurchase plan. We continue to be active in the acquisition space, and we are funding our significant organic growth. As always, I'd like to thank you for your interest in EMCOR. I'll take questions, and Grace, you can open the line.
Thank you. As a reminder, to ask a question, you will need to press star then the number one on your telephone keypad. To withdraw your question, you may press the pound key. Please stand by while we compile the Q&A roster. Your first question comes from the line of Sean Eastman from KeyBanc Capital Markets. Your line is open.
Morning, Sean.
Morning, team. Thanks for taking my questions. Tony, first one, when you talk about being very disciplined on new bookings, what exactly does that mean? Is that just pricing, like, really nailing down the pricing, or is it picking jobs where you think you have the supply chain on lock? Explain that to me on how you're approaching new work. It's part of the things we talked.
Let's think about what goes into an estimate and where you need to be disciplined. In a normal environment, right, supply chain is really not that much of a variable, right? Because we have great relationships with our suppliers. We know how to scope and descope, or we don't miss scope very often. We can get pricing right; we can lock it in.
In this environment, discipline means you make sure that on your key components that you really understand what delivery could look like. Then you benchmark that directly versus what they've been telling you versus what they've actually been doing. It's no longer just saying, "Hey, you told me it would be this ridiculous 36 weeks. The last 3x , you actually delivered it in 42 weeks." When we make our estimate, we're not telling everybody else, but we're making an estimate closer to the 42 weeks, and then we're gonna do our resource planning around that. You also try to lock in all the commodities that you can, and you actually let the purchase order. In a non-inflationary environment, you're not as worried about that.
You actually let the purchase order, and you get the supplier to commit, and you have to be disciplined to hit those windows. Typically, before, a supplier would let their price out there for 30 to 60 days. Sometimes now it's as quick as seven or eight days, and you have to be very, very on top of the process to make sure you're locking in that quote for that job if you get it. The other things, you have to take a really hard look at your customers that you're gonna work for, and for us, that's multiple places in the channel. Who's the owner that ultimately is gonna own this project if we're not working directly for the owner? Who's the general contractor, construction manager and what their team looks like?
If the owner's purchasing the equipment, do we have clear line of sight on that equipment? Do we have the lines of communication open to make sure that that owner's gonna have the equipment delivered? Do they have a good track record of delivering? Our information management and our experiential data is more important than ever around the pricing of that product. Then it's about labor availability, something we don't really have a lot of issues with. When projects slide, like we had some very good data center projects move in the first quarter to the second quarter and beyond. Again, we're doing work there, but then we have to sequence our work to make sure that we can have the right resources at the right time.
Because what we really worry about first is, can we get the right labor with the right skills at the right place at the right time to deliver the project? You put all that together, that's how you price a project. You gotta do. Again, you can't just take things that are quoted to you. You have to recheck against what people have been doing in their recent history. On a small project, it's a little different. It's become very different. Typically, a small project being $200,000-$300,000, that a lot of times would be executed in a quarter. With extended lead times, now you got to say, "Okay, customer, you want this done? You actually need to have this done.
However, the window you planned on us doing it looks a little different because here's what supply looks like right now. That supply is different than what it was gonna be than you're used to us doing this replacement project. Therefore, this is how we have to price it. That's how you think about project large and small. You get into break-fix work, which is the repair service that Mark talked about, which is actually we expect to continue to grow through the year. There, you have to be really on top of what the variables going in. We know labor, we know labor costs. You know, this fuel spike, and we've seen it over the last year, we were very good at catching up.
Just to give you a backdrop of how things are different, Sean, I mean, I've been doing this a long time, all the way back to when I was a carrier with HVAC technicians. You typically would reset your standards right before summer, right? Because that was your busiest time of year from June till September. You would reset standards then. Last year, we reset them almost 3x , and I say almost because some of the northern cities we didn't have to do as much because they're not as busy towards the end of the year. This year, we've already reset them twice. Our customers have accepted it. They know what's going on in the world. In that, you're always behind, right? You can't charge customers for something that hasn't happened yet.
They also know that we'll be a month late taking it off because they understand what happened up front. Of course, it helps to have very skilled technicians when you do that, because when you have those very skilled technicians, people want them to be able to do their work. It all works together. Yes, pricing has gotten more complex, but it's mostly got more complex on really not having the same level of trust in the supply chain for people to execute what they said they were gonna execute.
Okay. Got it. Thanks for that, Tony. This one's a little more granular. If I look at the midpoint of the earnings guidance for the full year, it implies that the first quarter will be a lower proportion of that full year outlook than we've seen over the past few years. Can you just you know help me get comfortable with sort of that implied catch-up there? You know, I can you know think of a few things that would make that make sense, but I just wanted to kind of give you guys the floor on that element.
Yeah. Yeah, I'll kick it over to Mark. Well, the biggest variable, as you look at the back half of the year that hasn't happened in 2020 and 2021 is we expect EIS to be profitable in the back half of the year. I mean, that's the biggest variable. So that's one of the ways you catch up. The other one is, if you go to the midpoint, there's an obvious just math exercise. We have less outstanding shares, right? So as a result of that, the math works. We also believe that our project timing and execution is back half weighted this year. We sort of knew that going into the year, because of the scheduling of some of our larger project, and nothing's changed along those lines. Mark?
Yeah, Sean, the only thing I would add to Tony's comment is, you know, we're presuming that revenue is going to continue to grow at the levels it did in the first quarter, presuming we're going to get some incremental improvement and margin contribution, which clearly we believe that, otherwise we would have changed guidance. You know, it's going to be disproportionate, right? I mean, I think the problem with the quarter that we're announcing today or that we announced today is that we didn't get the same level of pull-through from the revenue activity for all the reasons that were discussed prior to your question.
We've done everything we can to make sure that for the things that, you know, I would define as self-inflicted are not going to recur in quarters two, three, or four. If we get the external environment just to stabilize at this point, you know, we're comfortable with how it's gonna shake out.
Very helpful. I'll turn it over there. Thanks, guys.
Thank you, Sean.
Thank you. Your next question comes from the line of Noelle Dilts from Stifel. Your line is open, ma'am.
Hi, thanks.
Good morning, Noelle.
Good morning. My first question is pretty specific. You mentioned the delay in telecommunications projects. Can you expand on that at all? Is it wireless, wireline?
No, no. Data centers.
How should we think about that? Data centers?
Yes.
Okay.
Yes.
Just wanted to make sure I was thinking about that right. Okay, perfect. Second, you know, you hear me almost every quarter ask about M&A and how you're thinking about the valuations in the market. I would think that multiples have come down a bit. Could you comment just on how you're thinking about, you know, potentially getting more active on the M&A front and, you know, just what you're kind of seeing in the market in terms of opportunities?
Yeah. I mean, we have a pretty good pipeline. I mean, we've made a couple tuck-in deals in the first quarter that we expect actually to be really good, because they give us a labor force in markets that we want to grow. What we're not going to do is inherit somebody else's problems. It doesn't mean they're bad companies. It means the trends we saw in the first quarter in our business; they have in spades because they don't have this level of process control and sophistication we have or connection in the supply chain. Where we can get comfortable or where we think we can help in that acquisition close that gap, we'll make it. Where we think there's a gap in their execution and their projects around those issues, we'll probably take a pause.
That being said, we're active acquirers. We expect to continue to do deals like we have through our history. Broadly defined, it'd be in any of our segments. Little less so in EIS cause we think we have the platform we need, especially on the oil and gas side. We would make the right renewable or sustainable industrial energy acquisition there. We have a capability there that we would like to grow. But other than that, I mean, it's business as usual. We feel good. People want to be owned by EMCOR, and we want to buy them.
Okay. Thanks. That's helpful. Appreciate it.
Thank you. Your next question comes from the line of Adam Thalhimer from Thompson Davis & Co. Your line is open.
Hey, good morning, guys.
Morning, Adam.
Hey, what did you say about the timing of project closeouts? I think you said there was some that got pushed from kinda late in Q1.
We typically, right? Last year, we had a very good closeout portion in Q1 of last year, and we said that, right? I mean, that was something we said on our first quarter call last year. We had less of that happening mainly around supply chain issues, right? We need materials to come to us to finish the job so that we then can commission the job and get off the job. Because of the slowdown and the missed deliveries and the incomplete shipments, we had more of an issue with that in the first quarter. Here's what I think's gonna happen, right? A lot of these issues, we talked about it in first quarter last year that we saw it coming. It really started to hit with lead times, especially mid third quarter 2021. We've adjusted to those lead times.
We should start seeing a lot of that equipment come in here, and those missed deliveries start to catch up here, May, June, July, August. Mark, do you have anything to add there?
Yeah. I think, you know, Adam, you know, once again, we don't control the timeline of our customers' projects. When we entered into 2022, you know, we definitely had different sequencing, especially in the data center space. Even with the delays that both Tony and I have mentioned during the call today, the way that the RPOs were gonna burn through revenue was actually more late 2022-weighted than 2021, you know? If you reflect back on 2021, you know, our margin performance was actually stronger through the first six months than it was through the last six months of the year. That was once again, just because of the mix of work. You know that phenomenon is going to exist in 2022 as anticipated, except that it's the inverse.
It's more back half of the year than first half of the year. Putting aside the supply chain discussions that we've had.
Which would happen anyway.
Yeah. You know, the work was scheduled to happen later in the year. A couple things that happened relative to the first quarter. It certainly does not change the quantum of the year, but certainly did impact the first quarter.
Yeah, you know, we don't give quarterly guidance for a reason. Clearly, we anticipated that Q1 would have some challenges around it just from project sequencing and timing. Regardless, we could have a great supply chain right now. We would've had some of those issues. They were a little more pronounced because of the supply chain.
Okay.
The Omicron. I'm like, we're like whistling past that. Omicron was a big deal for us in the first quarter. I mean, there were parts of our company that had 20% of their workforce out on large jobs. That's a big deal. I mean, we got through it. It was tough, and we'll soldier on.
Okay. Tony, if you look at your large projects, your EPC jobs, what stage are you in generally if you look at that whole portfolio?
Well, I think Mark talked about that. I mean, that's part of what we talked about project sequencing and timing on 2022. We knew that some of our larger jobs would be starting up in late 2021. That's part of what you saw in late 2021. It's part of what you would've seen in the first quarter, even absent Omicron or supply chain. Some of that's been shifted a month maybe, as we wait for the sequence. You know, we're not, you know, fool us once, right? We're a little more reticent about how these jobs will start up. It may have moved things 30, 45 days to get to full ramp. But that the stages are much earlier in their stages than they were in the first part of 2021.
Okay. Just lastly, I'm trying to parse through your industrial commentary. Are you, I mean, vis-a-vis three months ago, are you? Sounds like you're maybe a little less confident on the refinery output this year?
No.
No?
I didn't want you to read into that. I'm always. Look, if you've gone through what we went through over the last 21 months, you're gonna be a little cautious, right? Demands strong. Customers are healthy.
Refinery utilization is high.
Refinery utilization's high. I mean, crack spreads are good, despite the price. Our customers are healthy. They're talking to us about all the right things. We're helping them with some of their biggest needs, even outside of just turnarounds. What makes me cautious is just to be cautious with the customer base. The other thing that makes me cautious is they get a lot of pressure to keep running, right? Because we need the supply in the market. We've heard nothing that makes us less than confident, what's going on in that space this year.
Got it. Okay. Thanks, guys.
Is that it?
Grace, is there anybody else?
All right. Look, thank you all. Thanks for your time. Thanks for the thoughtful questions. We're gonna work real hard to continue to produce. Like most things, we will get through this too. We will figure out how to manage the supply chain, and we will make it work. Thank you all very much.
Thanks.
Thank you, ladies and gentlemen. This concludes today's conference call. Thank you for joining. You may now disconnect.