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We love what we do. We have been building amazing spaces for our clients for over 50 years, and it’s still just as rewarding. Combining industry-leading safety standards with a commitment to quality, sustainability, integrity, and creativity, we provide a complete range of services, from site selection analysis, design constructability review and aesthetic enhancements to interior fit-outs and building infrastructure upgrades and modernization. The STO Building Group (STOBG) family of builders—Structure Tone, LF Driscoll, Structure Tone Southwest, Pavarini Construction Co., Pavarini McGovern, Govan Brown, Ajax Building Company, BCCI Construction, Layton Construction, Abbott Construction, RC Andersen, and STO Mission Critical—includes over 5,700 employees located in offices throughout the US, Canada, UK, and Ireland.