Our commitment to building complementary platforms in construction, management, and engineering unlocks principled and meaningful growth. By focusing on the long-term and supporting our partner companies with capital and expertise they don’t just adapt – they thrive.

Invested for the Future

FY19 Revenue


Top 400 ENR Contractors


Employee Ownership


Partner Companies

Construction Services

Our construction services platform, STO Building Group, is a family of 13 companies with over 3,000 employees located in offices throughout the U.S., Canada, U.K. and Ireland.

Global Engineering & Consulting Services

Our parallel strategic priority is to complement the leadership position of STO Building Group’s Construction Management Services. Our Global Consulting Services platform brings together the complementary services and markets active in program and construction management, engineering consulting, and environmental services.

“With public and institutional clients continuing to look for innovative alternative delivery project approaches, the combination of Consulting and Construction Management services enables us to deliver even more value and service to our clients globally."

John Dionisio

Vice Chairman

Select Projects from Our Partner Companies


New York, 330 West 34th Street, Suite 1200

Newport Beach, 660 Newport Center Drive, Suite 940 

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