About STO Building Group

We love what we do. For over 50 years we’ve built amazing spaces for our clients, and it’s as rewarding as ever. We love tackling each project’s challenges, solving the puzzles they bring, and building relationships with colleagues new and old, of all industries, with each project we take on.

Our secret sauce has always been our “client first” mentality. Regardless of the project size or scope, our commitment is first to our client and their vision, enabling them to set new standards in building efficiency and sustainability, or in employee wellness and productivity, or in-patient care or technology—or whatever their goals may be.

We’re also at the leading edge of construction management. We use virtual tools to reduce project costs and schedules, improve speed to market, and keep us fully adaptable throughout the entire process. Our unique company ownership model, shared between our own employees and strategic outside advisors, also provides the resources for us to invest even further in the people, processes, and technologies that best serve our clients.

We are able to maintain those high standards thanks to our diverse resources and expertise. The STO Building Group family of companies— 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, and RC Andersen —includes over 4,000 employees located in offices throughout the US, Canada, UK, and Ireland. Together, we’re able to provide a complete range of services, from site selection analysis, design constructability review, and aesthetic enhancements to renovated interior fit-outs for a wide range of terrific clients, new building construction, and major building infrastructure upgrades and modernization.

We solve our clients’ challenges and service our chosen markets by

Fostering long-term relationships with our clients, employees, and partners
Creating a culture of collaboration, integrity, and transparency
Providing innovative construction solutions
Delivering project excellence and workplace safety
Executing sustainable organizational growth and financial strength

Partnering to imagine, execute, and realize our clients’ vision.

Key Facts

New York, United States
Company Type
Company Specialty
General Contractor


2021 Adoption Leaders 50 List

2020 Adoption Leaders 50 List

People Who Work Here

Tegan Gahan

Emerging Technology Manager

Rob Leon

Chief Innovation Officer

Mafe Alizo

Senior Innovation Analyst

Stephen December

VDC Department Manager @ Pavarini McGovern


Estimating Manager

Jim Donaghy

Executive Chairman
View all company members