Thanks, Mark. And I'm going to start on Page 12. We really could think of this, the way we talk about earnings is, we just talked about everything that happened in the past, and this next section is all about the future. And if you go to Page 12, we've talked about this chart probably about three quarters ago, we started talking about it. And I look at this as a resource allocation chart. It not only informs how we allocate resources to drive organic growth but this chart also informs our capital allocation decisions, which we'll talk about later. So if you think about this chart and moving left to right, and it will be some intermixing. The first part is the electrification EV value chain, it's a trend. And there's been a lot in the news lately about what's happening, is it stalling and all that. In our world, it's not right now, because of where we played. For us, it's mainly been about fire and life safety and utility scale charging stations, and now solar is starting to come back up on the radar. But the way I think about this, this is a major transformation, whether EVs and the electrification is 10% of vehicles, whether it's 15% of vehicles, whether it's is 30%. And clearly, the policy got a little ahead of the technology here, but that's okay. At the end of the day, all these facilities will be built. Some of them, the battery infrastructure is going to have to be built again, no matter what penetration it has. It's a lot more than it is today. And the utility scale charging stations that we participated in, these are at major hubs of transportation. And some of this is well underway, because it makes sense, especially for delivery vehicles and other things that have lighter weights. The solar is just starting to reengage in our part of the world and we do that mainly in electrical. We do that some in the electrical segment, some in the sub-utility scale in building services, and we'll talk about that later. But then at scale, we do it in industrial services through our electrical business there. We have great capability there. And it's also supported by the IRA and government incentives. And we are privileged to be able to either do that with union labor where applicable or we have the necessary prevailing wage experience and apprenticeship programs in the nonunion world to be able to do that. And you'll hear that theme across some of these trends. Then you get to the high tech manufacturing, look, mainly on electrification, EV value chain, pretty good market. What we're building we're going to continue to build. All big markets go through periods of up and down but the long term trend, I think, is intact. And again, whether it's 7%, 15% or 30%, there's a lot of facilities, a lot of utility scale charging that needs to happen. And if we just get a share of the solar market going forward, we'll see that in our Industrial Services segment. You go to high tech manufacturing, life sciences and you really got to look at this box and draw a little loop down to reshoring and near shoring. We learned in COVID that supply chains weren't as resilient as they should be. I don't think we learned that, we probably knew that. But we needed to have a lesson like that. So we're seeing our customers move their supply chains back onshore. This was happening even before COVID, because the wage differential versus the transportation and the uncertainty of transportation was not what it was, and automation allow you to make up for a lot of that wage differential. But you're really seeing it, the semiconductor manufacturing, which we're such a big part of, and we've expanded where we can do that. We only could do that in a couple of markets before. Now we can do that and double that number. So when we were two before, now we're 4 to 6. And that is, for us, weighted towards mechanical. But in electrical, we still do that work there in fire and life safety. So it represented all trades but weighted more towards mechanical, and you see that in our RPOs. And you go to pharma, biotech, life sciences, again, there's two things happening there. There's reshoring and we're in a lot of the right markets to make that happen, whether it's the Carolinas, parts of California, Indiana or New Jersey. But there's also an explosion of new drugs, specifically around weight loss. And new lines are being added, new capacity, and we're part of that. And you're also seeing in this high tech manufacturing life safety, nearshoring, is these major tech companies building hubs outside of Silicon Valley, whether it be in Research Triangle Park, Texas or Arizona. Again, places we're well positioned to take advantage of helping our customers. And again, you go to the government incentives, it's focused on getting skilled trade labor on the job that's trained the right way. We do that either through our union relationships or through skilled apprenticeship programs. And you have to understand how to work in a PLA, a prevailing wage world, we're expert at that. And our subsidiary CEOs, our segment leadership and our corporate leadership knows how to put the right parameters around that to make sure that we comply with what we told our customers were, so they qualify for the incentives that they want to receive. Then you move to the right, and again, part of that high tech manufacturing is driven by AI and data center buildout. Go to data centers, we're really good. And we've been really good at this for a long period of time. We started this back in the early 2000s. There was a little bubble up in 2010, '11. We kept that capability. And that leadership we have in our electrical and mechanical segments and some of our subsidiary leaders, they are world class specialty contractors and data centers as is our fire life and safety offering. So what's driving demand here? Driving demand is us, right? We want more and more service. We -- big companies like EMCOR is putting more and more things in the cloud, but also the proliferation of AI, and that needs more systems. These went from 5, 10, 15-megawatt facilities to 50, 80, 100 megawatt facility. So just put that in perspective, if you look at an office building or even a hospital complex, you look at a large hospital complex, that maybe is 5 to 10 megawatts. So think about what that one data center is using today to drive the things we need to be more productive or to outsource or get things into the cloud. Increased power requirements, then you're going to go back to the remodel of some of the data centers that were built to uplift the power in there and also have different kinds of server racks. So we not only participate on the front end, electrically and mechanically in fire and life safety, we also participate in, we call it the day two work, to allow it to receive the racking and then also finally in the retrofit and remodel. We've done a lot of work around these three top trends over the past year and half, two years to understand the long term trends. We feel pretty good about where we're positioned. Going down to healthcare, EMCOR has always been world class hospital builders. It's hard to go into a major city that we're in and not know that we weren't part of that healthcare skyline. Whether it's the Texas Medical Center in Houston, whether it's Massachusetts General and a whole hospital complex past Fenway in Boston, whether it's in San Diego, whether it's in Chicago, we're part of that healthcare skyline. And what we learned in COVID, those facilities need to be redone in many cases, also need to be made more flexible. And when you think about those healthcare facilities, they are rich, system complex environments. They don't look other than some of the high purity things, which an operating room is, a lot different than these high tech manufacturing and life science plants. There's a lot of commonality between that hospital build and high tech manufacturing. And that allows me to talk about what we do -- I talked about it and started, this was a resource allocation game at EMCOR and figuring out where the best opportunities for us to perform, perform well, keep our workers safe and productive and get superior results for our shareholders. And so a lot of the capabilities we've built across these different boxes, we can use in the different boxes. And that is the wonderful thing about our skilled trades, that's the wonderful thing about our supervision. And the engineering that we have at EMCOR, which is more design assist, value engineering people that designed to build, right? We figure out how to make it more buildable and that's what BIM and prefabrication have allowed us to do. And last but not least, you get the energy efficiency and sustainability. I don't think any of us sit here to say and say, oh, yes, I know energy prices are going down in the long term. That can't be true because you have an energy transformation going on, coupled with this great demand coming out of things like high tech facilities, data centers, the electrification, they use a lot of energy. So energy efficiency is also for owners and energy security, people are concerned about reducing their emissions, because it's not only in a lot of ways the right thing to do, it's the most cost effective thing to do over the long term. And nobody does that better than our EMCOR mechanical services businesses, in Building Services, also partly in our mechanical construction business. Yes, the lighting is good and all that, that's a given. But the complex things we can do around HVAC design and what we can do with building control systems, we do that world class. We are one of the leading applied building controls companies in the country, and we can deliver superior results for mechanical solutions for our customers. And we've expanded our ability to do that with some recent acquisitions to talk about water and waste reduction, talk about the building envelope as part of someone's else drive to get facilities rationalization and energy efficiency. Sometimes you'll see these things coupled with an alternative energy solution or a cogen solution, where they'll add solar, they'll add a cogen solution where you're taking steam and converting it into a cooling or you're converting it into power. We have folks in the field, we have great engineers they know how to do that, that work within the built space to drive great energy efficiency and superior results for our customers and reduce their energy needs. So I could stop there. We could stop talking about the future, but we're going to go now shift to Page 13 and talk about RPOs and how that page, Page 12, manifests itself into RPOs. I mean ultimately, great trends, but you don't know how to capitalize and turn it into projects, really doesn't mean a whole lot. So if you look on Page 13, you can see the impact of those major trends in our RPOs. Total company RPOs at the end of 2023 were over $8.8 billion, up almost $1.4 billion or almost 19% over the December 2022 total of $7.5 billion. Additionally, fourth quarter project bookings were strong with RPOs increasing $212 million from September 30, 2023. Domestic construction services RPOs stand at $7.3 billion, a record, up $1.3 billion from December 2022, in line with strong project demand across most of the market sectors in which we operate, and then we've seen that throughout the year. Building Services, which are anchored by energy efficiency projects and retrofit projects ends 2023 with a healthy project pipeline and also exemplified by almost $1.3 billion of RPOs. RPOs by market sectors are balanced end market segmentation, bridging back to the previous page of organic growth trends in the marketplace. Looking into the actual activity, high tech manufacturing, which includes semiconductor, pharma, biotech, life sciences, R&D and the electric vehicle value chain stands at $1.5 billion, up $686 million or 89% from year end 2022. Network and communications, which includes hyperscale data center work, stands at almost $1.6 billion, up $578 million or 59% from December 31, 2022. Healthcare project demand continues to be strong as we have over $1 billion in healthcare RPOs, which is primarily made up of new hospital construction or expansion projects. We also currently have RPOs of nearly $650 million in water and wastewater projects, which for us are predominantly located in Florida's Miami Dade County and also the West Coast of Florida from targeted projects from Tampa to Naples. Reshoring and nearshoring trends continue for our manufacturing and industrial customers reflected in $808 million in project RPOs. During the year, we also saw increases in transportation and short duration projects. Partially offsetting these RPOs were decreases in commercial, that's primarily driven by warehouse and hospitality projects. However, with respect to warehouses, we are seeing an uptick in activity for cold storage warehouses and upgrades in those cold storage warehouses for our fire and life safety services and projects as customers introduce more automation and change warehouse configuration. As the calendar moves into 2024, we continue to see strong multiyear growth characteristics in many of the market sectors we serve. Our scale and operational excellence sets us apart from others in the marketplace and make our operating companies some of the most capable partners for our customers. As the diversity in our RPOs demonstrates, we have the flexibility and capability to move across these sectors to address trends in the markets as they arise. As we progress through 2024, the pace and compositions of RPOs may change, based on the way our customers contract with us and become more familiar and part of their site build up. Once we are on a customer site frequently or sometimes subsequent portions of the project at the site are awarded in scopes of work that are smaller than the initial award. And second, supply chain issues and lead times are now being factored into the initial planning, thus avoiding the previous delay that led to some of the buildup in RPOs, especially in Building Services. With respect to capital allocation, which I'm going to show to you on Slide 14, our Board has approved an increase in our quarterly dividend from $0.18 per share to $0.25 per share. We have a good acquisition pipeline and tend to use some of our firepower to execute deals. We recently signed definitive agreements to purchase a company in Texas and one in the Greater Atlanta area, both of which add capabilities to our mechanical construction segment. We also bought a company or signed an agreement for a company, which will be a bolt-on for our mechanical services division. We expect to send around $140 million in aggregate upfront purchase price in connection with these acquisitions. We expect to close these acquisitions as we move further into 2024. And we'll take the opportunity to expand our capabilities and increase our geographic reach to better serve our customers when we can purchase companies with the right skills and culture. We like our pipeline of deals, but as I always said, deals happen when they happen. Now let's turn to Page 15 and 16. Our exceptional performance in 2023 resulted in three meaningful guidance increases in 2023, as our operating margin strengthened throughout the year, primarily because we performed well and efficiently on difficult and complex projects, some of these projects had favorable contract terms. And what that really means is we don't get into protracted disputes with our customers. We work to finish the job together. And we had some outstanding disputes that we successfully resolved in 2023. As we set guidance for 2024, it is important to remember what I mentioned earlier at the start of this call. We're coming off a three year CAGR of nearly 28% and we had 65% growth in earnings per share this past year. We do expect to continue to grow earnings for our shareholders this year. For 2024, we will set guidance at $13.5 billion to $14 billion in revenues and $14 to $15 in diluted earnings per share. Our guidance assumes strong operating margin performance. Our guidance assumes strong operating margin performance. As previously discussed, we started the year with excellent RPOs in our electrical and mechanical construction segments, and a good base of RPOs in our mechanical services division within our US Building Services segment. However, we have nearly $300 million in revenue headwinds in the US and UK Building Services segment combined. They are coming from the result of loss of facility services contract that we lost on rebid despite strong customer scores on our service delivery. Despite this, we still expect low to mid single digit revenue growth in US Building Services. As reflected in our RPOs and as discussed previously, we continue to work and win work in important and strategic market sectors. We are executing our work with efficiency and precision as shown by our operating margins. We are utilizing BIM prefabrication in our labor and supply management capabilities with an eye towards delivering superior results for our customers and shareholders. However, as I stated in previous calls, it is important to remember that operating margins can fluctuate quarter-to-quarter based on mix, execution and timing of projects. We evaluate our operating margin performance in terms of ranges over quarters. And our performance in 2023 yielded operating margins for most of our segments, which were at or above the high end of our historical ranges, especially in our mechanical construction segment. We've shown great resilience in dealing with supply chain issues and continue to develop a strong bench performance through project managers to senior leadership. Further, we are attracting notable talent from skilled labor to senior project and operations management. Our outlook for 2024 is positive and for our ability to achieve the upper end of our guidance range, macroeconomic factors and other factors will come into play potentially. We remain concerned with the financial risk to some customers around continued elevated interest rates and also the macro uncertainties posed by the [Europe], the conflict and unrest in the Middle East and their impact on global energy markets and supply chains, as well as the dysfunction occurring in the US Government, which may lead to a government shutdown or the inability key pieces of legislation. We also realized that our customers adjust the scope and timing of long term projects, consistent with their immediate, intermediate and long term capacity needs. Despite these challenges, we believe that we will be able to navigate these uncertainties as we have as our team has shown great resiliency in the past. We remain cognizant of these external factors and the potential impact on our execution and performance. We're going to continue to be balanced capital allocators. Specifically, as discussed previously, there remain opportunities within our acquisition pipeline and we just increased our dividend -- quarterly dividend to $0.25 per share. We will continue to pursue opportunities to grow profitably, both organically and through acquisitions and our share repurchase program remains in place. As I've said before, with the uncertainty in the financial markets, we believe that our strong balance sheet helps us win work on large sophisticated projects as customers see our financial strength as just another reason to choose EMCOR. As always, I want to thank the entire EMCORE team for their dedication and hard work. We appreciate all you do every day for our customers. With that, I'll turn it over to you, Alan, to open the line for questions.