The STO Building Group (STOBG) family of companies—Structure Tone, Structure Tone Southwest, Structure Tone International, Pavarini North East Construction, Pavarini McGovern, LF Driscoll, LF Driscoll Healthcare, Govan Brown, Ajax Building Company, BCCI Construction, Layton Construction, Abbott Construction, RC Andersen, and STO Mission Critical—includes over 4,500 employees located in offices throughout the US, Canada, UK, and Ireland.
