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Headquartered in Walnut Creek, Calif., Brown and Caldwell is a privately-held, 100 percent environmental firm with 1,600+ professionals serving clients locally and globally from 52 locations. We are the largest engineering and construction firm solely focused on the U.S. water and environmental sectors.
FlatironDragados is a prominent civil engineering and construction firm operating in the U.S. and Canada. Formed from the integration of Flatiron and Dragados North America, it is now one of North Americas largest civil engineering companies. The firm reported combined revenues of $6.1 billion in 2023, with a backlog of $18.5 billion as of 2025. It is jointly owned by DRAGADOS, S.A. and HOCHTIEF, and led by CEO Javier Sevilla. The company specializes in large-scale infrastructure projects, including transportation systems like roads and bridges, water and environmental facilities, specialized construction such as tunneling, and public-private partnerships. FlatironDragados operates across 24 U.S. states and eight Canadian provinces, collaborating with both public and private clients to deliver essential infrastructure. The firm is committed to innovation and community-focused development, actively recruiting professionals in engineering and construction.
Callison, LLC is one of the leading companies in the Real Estate and Construction sector.
Tait Communications is a global leader in designing, delivering and managing critical communication solutions that help utilities and public safety organizations to keep the lights on and communities safe.
Michael Brady Inc is currently one of the largest firms in the southeast. Based in Knoxville, MBI offers a full service experience to its clients by incorporating all architectural and engineering services for a project under one roof.