Comfort Systems USA Shoffner is the region’s leader in HVAC, Electrical, and Plumbing services. We have a well-established reputation for quality work done by quality people and are one of the top 3 largest mechanical contractors in the nation and the value leader in the market. We strive to be an exceptional building solutions provider. We are creating a supportive, collaborative, and innovative environment that allows us to recruit, train, and retain the best professionals.