When you join TAS, you join a Houston-headquartered company that is part of a large Houston-headquartered publicly traded company, Comfort Systems USA, with a solid reputation built on outstanding value, integrity, and customer focus. “smoking” and “tobacco or nicotine products” includes, but is not limited to, product such as cigarettes, e-cigarettes, cigars, pipes, vaping, all forms of smokeless tobacco (chewing tobacco, snuff, dip) and clove cigarettes .