Tetra TECH EC, Inc.

Tetra Tech EC, Inc., a subsidiary of Tetra Tech, Inc., provides environmental consulting, environmental remediation, geospatial analytics, and natural resource management services to federal agencies as a prime contractor, competing full-and-open without set-aside designations. Based in Lakewood, Colorado, Tetra Tech EC operates as a for-profit division of its California-based parent and delivers work across environmental compliance, habitat restoration, NEPA planning support, and munitions response site assessment.

Tetra Tech EC's federal footprint comprises 753 prime awards with a combined potential value of $661 million and $1.23 billion in total obligated dollars. The customer concentration is heavily weighted toward the Department of the Army, which accounts for 253 awards (34% of the award count) and $243.8 million in combined potential value. The next largest customer by dollars is the Department of the Interior's Bureau of Land Management National Office, with 4 awards carrying $50.3 million in potential value — a tension signal indicating a few large BLM awards anchor the dollar share despite Army's volume dominance. The Army Materiel Command at Aberdeen Proving Ground places 161 orders valued at $45.3 million, and the Department of the Air Force places 81 orders through its Installation Contracting Agency valued at $16 million. These top five customer components account for 74% of awards and 58% of combined potential value. Work spans the Department of Agriculture Forest Service, the National Park Service, and 48 additional federal agencies.

Tetra Tech EC operates predominantly under three parent vehicles. The largest is an Indefinite Delivery Contract (DAAM0297D0012) with 411 task orders worth $288.8 million in combined potential value, likely the Army's environmental remediation and compliance vehicle. The Professional Services Schedule (GSA) carries 187 task orders valued at $85 million, and a second Indefinite Delivery Contract (FA890304D8677, likely Air Force) holds 102 task orders worth $68 million. Smaller vehicles include a second Air Force IDC (F4162403D8600) with 24 orders and the Multiple Award Schedule with 10 orders.

The award category mix reflects the subsidiary's environmental remediation and assessment focus: 219 awards fall under Remediation Services (NAICS), 197 under Environmental Consulting Services, with the remainder in engineering and geophysical surveying. PSC coding shows 402 awards in Environmental Systems Protection—Environmental Remediation and 72 in Other Environmental Services. Recent named work includes a $1.62 million cost-plus-fixed-fee definitive contract with the Army Corps of Engineers for UltraTEMA-4 technology demonstration at an underwater munitions response site in Richland, Washington (completion December 2029); a $369,235 delivery order from the Department of the Interior for San Pedro River restoration environmental assessment in Arizona under GSA MAS; and $319,910 for seagrass habitat restoration at Biscayne National Park under the National Park Service. Activity has been sparse in recent years — only one award in 2023 and one in 2025 after steady three-to-four-per-year output from 2020 to 2022 — with minimal recompete exposure ($994 thousand in awards completing within the next twenty-four months).