Tetra TECH / Mason & Hanger Joint Venture

Tetra TECH / Mason & Hanger Joint Venture, doing business as Tetra TECH, is an architect-engineer services prime contractor delivering comprehensive design, engineering, energy resilience, and infrastructure modernization services to Department of Defense and federal civilian agencies across 48 awards (combined potential value $899.5 million) with no subcontract footprint—all work performed as a prime. The joint venture, formed between Tetra Tech Inc. (parent, headquartered in Pasadena, California) and The Mason & Hanger Group Inc., operates full and open (non-set-aside) competition across its federal portfolio, with firm fixed-price pricing on the majority of delivery orders.

The vendor's capability portfolio centers on multi-discipline architect-engineer services, energy feasibility studies, facilities assessments, design-bid-build package development, microgrid and power generation design, construction management, commissioning services, and infrastructure planning for military installations and federal facilities. Representative work includes a $17.13 million delivery order from the Army Corps of Engineers (issued under the FBI Wide Architectural and Engineering Services IDV) for architectural and engineering design services supporting the South Campus Practical Problems Venue Zone at Redstone Arsenal, Alabama; a $5.39 million delivery order for the FY26 ERCIP JBLM Microgrid cultural resources study modification at Joint Base Lewis-McChord in Yakima under the Centralized Energy Resilience and Conservation Investment Program AE Services Interim IDC; and a $6.91 million delivery order from ENDIST New York for design documents for the Ammunition, Explosives, Toxics, Advanced Research Facility at Picatinny Arsenal.

Customer concentration is heavily weighted toward Army Corps of Engineers districts and the Department of the Navy. The top five funding agencies account for 69% of awards by count but 95% of combined potential value, with the Army Corps of Engineers Engineering Support Center Huntsville anchoring the portfolio at 5 awards worth $299.4 million, the Army Acquisition Support Center PEO Ammunition at 1 award of $240 million, and the Naval Facilities Engineering Command at 4 awards worth $194 million. The FBI's Headquarters Division places 10 awards totaling $73.5 million, and the Engineering District New York contributes 9 awards worth $43.7 million. This concentration reflects the joint venture's positioning as a prime on energy resilience and installation modernization programs across multiple Army Corps of Engineers regional commands.

The vendor holds six active indefinite delivery contracts with combined ceiling value exceeding $720 million. These include a $249 million multiple-award IDIQ from the Engineering Support Center Huntsville (Centralized Energy Resilience and Conservation Investment Program AE Services, ultimate completion November 6, 2030), a $99 million single-award contract from the Naval Facilities Engineering Command for architect-engineer design services supporting the Southeast North Area of Operations (February 3, 2031), a $95 million multiple-award IDIQ from Naval Facilities Engineering Command for Navy and Marine Corps planning and engineering (October 31, 2027), a $45 million contract from the Engineering Support Center Huntsville for energy resilience consulting (September 28, 2025, nearing expiration), a $240 million multiple-award IDIQ from PEO Ammunition for multidiscipline architect-engineer services in support of the Norfolk District Army Ammunition Program (August 12, 2030), and a $32 million multiple-award IDC from ENDIST New York for on-demand architect-engineer design and infrastructure support services (September 2, 2026, nearing expiration). The vendor places task orders under these vehicles with consistent velocity — 12 task orders under the Army Materiel Command indefinite delivery contract, 9 under the FBI Wide Architectural and Engineering Services vehicle, and 8 under the ENDIST New York $32 million IDC.

Award activity has grown from 7 awards in 2022 to 9 in 2025, with 5 awards recorded year-to-date in 2026. Eight awards (combined potential value $39 million) face ultimate completion in the next twenty-four months, creating recompete exposure principally on the Engineering Support Center Huntsville's $45 million ERCIP contract (September 28, 2025, already past nominal completion but possibly extended) and the ENDIST New York $32 million IDC (September 2, 2026). The category concentration reflects the joint venture's narrow focus: 38 of 48 awards fall under Engineering Services NAICS, 10 under Architectural Services NAICS, and 27 awards carry the Architect and Engineering–General (Other) PSC code. Work is performed primarily in Ann Arbor, Michigan, with secondary performance sites at Huntsville, Alabama; Norfolk, Virginia; and Jacksonville, Florida.