Tetra Tech EC, Inc.’s operating units provide a wide range of services and further expand our service line and strengthen our company.

Tetra Tech Construction Services, Inc.

Tetra Tech Construction Services, Inc., provides wired communications services, including design, acquisition, management, construction, installation, testing, and maintenance for all types of narrowband, broadband, and wireless networks. They are headquartered in Littleton, Colorado. (303) 741-3245.

Tetra Tech Electric, Inc.

Tetra Tech Electric, Inc. (TtEI) is a full-service electrical contractor that provides project management and construction services for transmission, distribution, substation, switchyard, generation, and renewable energy projects. TtEI’s capabilities include design-build, wind energy, collection systems, tower wiring, overhead power lines, underground systems, utility installations, and electrical facilities. Its headquarters is located in Portland, Oregon. (503) 396-7409.

Tetra Tech Facilities Construction

Tetra Tech Facilities Construction is a general contracting division of Tetra Tech that provides full-service design/build, guaranteed maximum price, design-bid-build, CM-at risk, and agency program/construction management services worldwide for the U.S. Department of Defense, other federal /local government agencies, and private and commercial clients. Its headquarters is located in Alexandria, Virginia. (571) 527-4440.

The Delaney Group, Inc.

The Delaney Group, Inc. provides program management and construction services for energy, heavy civil, site development, and infrastructure projects, including wind energy, roads, bridges, grading, utilities, base realignment and closure (BRAC) services, and water/wastewater treatment and conveyance facilities. Its headquarters is located in Gloversville, New York. (518) 661-5304.