Thanks, Julie. Good morning, everyone and welcome to our first quarter earnings call. Let me start by thanking all the Comfort Systems USA employees for their hard work and fantastic performance. I'll start with highlights of our quarterly results and some comments about two recent events and then Bill will cover the financial results in more detail. We are pleased to report strong first quarter revenue and profits and a terrific start to 2019. Building on solid execution over the past several quarters, we had our strongest ever first quarter performance. Revenues are 16% higher than the first quarter of 2018 and 10% higher on a same store basis. We had another quarter of solid execution by our operating companies. As a result, earnings improved substantially with earnings per share of $0.53 this quarter, compared to $0.44 per share a year ago. The real increase in operating performance is even larger than this, because last year, we had a $0.07 tax benefit. Our backlog continues to build, with strong new construction activity in many of our markets. Backlog, as of March 31, 2019, is 1.14 billion and same store backlog is 4% higher, compared to the same time last year. Our booking trends continued to be good, service continues to grow and we were also happy to be able to reward our shareholders with another dividend increase. Overall, I continue to be optimistic about our prospects this year. As most of you probably know, in spite of our investments and precautions, over the last two weeks, we were struck by a ransomware attack that adversely affected crucial back office functions across our many locations. Despite the incident, our field work force has continued to work hard for our customers every day. Although a recovery is ongoing, I am happy to report that our operations were able to meet their ongoing obligations and we have returned to a normal functioning in most ways. Throughout this event our teams across the country worked together effectively and constructively to manage and ultimately overcome this challenge, and I am deeply grateful for that commitment. We believe that the effects of this incident are temporary. Comfort Systems USA is on track. On a much more positive note, we are very happy to announce a significant new investment in electrical contracting. As previously released on April 1, we closed our largest acquisition ever when we teamed up with Walker Engineering, a nationally prominent electrical company headquartered in Dallas and with offices and substantial operations in Dallas, Houston, San Antonio and Austin. We could not be happier to welcome the Walker team and we feel confident they will make a fantastic contribution to Comfort Systems. I will discuss our backlog and outlook in more detail in a few minutes. But before I get into that, let me turn this call over to Bill to review the details of our financial performance. Bill?