TETRA TECH, INC. THE GSA ALLIANT 3 GWAC PROVIDES IT SERVICES-BASED SOLUTIONS THROUGH PERFORMANCE OF A BROAD RANGE OF IT SERVICES THROUGH FLEXIBLE TASK ORDER CONTRACTING TO ELIGIBLE FEDERAL AGENCIES IN ACCORDANCE WITH GSA ORDER OGP 4800.2I. GWAC $1,000,000,000,000 FEDERAL ACQUISITION SERVICE FEDERAL ACQUISITION SERVICE — 541512 Computer Systems Design Services DA01 IT AND TELECOM - BUSINESS APPLICATION/APPLICATION DEVELOPMENT SUPPORT SERVICES (LABOR) Feb 25, 2026 Feb 25, 2026 Mar 9, 2036
TETRA TECH, INC. — IDC $5,100,000 US COAST GUARD US COAST GUARD — 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 7B22 IT AND TELECOM - COMPUTE: SERVERS (HARDWARE AND PERPETUAL LICENSE SOFTWARE) Jan 20, 2026 Jan 20, 2026 —
TETRA TECH, INC. THE CONTRACTOR SHALL PROVIDE ALL NECESSARY MATERIALS, LABOR, EQUIPMENT AND FACILITIES INCIDENTAL TO THE PERFORMANCE OF THIS REQUIREMENT IN ACCORDANCE WITH THE TERMS OF THE ORDER. IDC $151,000,000,000 MISSILE DEFENSE AGENCY (MDA) MISSILE DEFENSE AGENCY (MDA) — 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) AC13 NATIONAL DEFENSE R&D SERVICES; DEPARTMENT OF DEFENSE - MILITARY; EXPERIMENTAL DEVELOPMENT Dec 19, 2025 Dec 29, 2025 Dec 28, 2035
TETRA TECH, INC. US AFCEC NEPA/EA/EIS MATOC IDC $100,000,000 DEPARTMENTAL OFFICES DEPT OF THE AIR FORCE — 541330 Engineering Services C219 ARCHITECT AND ENGINEERING- GENERAL: OTHER Sep 25, 2025 Sep 25, 2025 Sep 24, 2030
TETRA TECH, INC. NEPA/OTHER ENVIRONMENTAL ANALYSIS BPA BPA $48,800,000 BUREAU OF OCEAN ENERGY MANAGEMENT BUREAU OF OCEAN ENERGY MANAGEMENT — 541620 Environmental Consulting Services B510 SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS Apr 24, 2025 May 1, 2025 Apr 30, 2030
TETRA TECH, INC. ENVIRONMENTAL QUALITY (EQ) PROGRAM MATOC IDC $249,000,000 DEPT OF THE ARMY DEPT OF THE ARMY — 541330 Engineering Services C219 ARCHITECT AND ENGINEERING- GENERAL: OTHER Apr 11, 2025 Apr 11, 2025 Apr 10, 2030
TETRA TECH, INC. THE NASA ENVIRONMENTAL SUPPORT SERVICES (NESS) BLANKET PURCHASE AGREEMENT (BPA) IS AN ENTERPRISE PROCUREMENT VEHICLE TO PROVIDE NASA LOCATIONS A WIDE RANGE OF ENVIRONMENTAL COMPLIANCE SERVICES. BPA $225,000,000 NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL AERONAUTICS AND SPACE ADMINISTRATION — 541620 Environmental Consulting Services F999 OTHER ENVIRONMENTAL SERVICES Mar 11, 2025 May 1, 2025 Apr 30, 2035
TETRA TECH, INC. ARCHITECT-ENGINEERING ENVIRONMENTAL SERVICES 2023 TO SUPPORT ENVIRONMENTAL PROGRAMS WORLDWIDE, A-E ES 2023 IDC $100,000,000 DEPT OF THE AIR FORCE DEPT OF THE AIR FORCE — 562910 Remediation Services R499 SUPPORT- PROFESSIONAL: OTHER Feb 6, 2025 Mar 3, 2025 —
TETRA TECH, INC. — IDC $999,999,999,999 FEDERAL ACQUISITION SERVICE FEDERAL ACQUISITION SERVICE — 541320 Landscape Architectural Services R499 SUPPORT- PROFESSIONAL: OTHER Dec 17, 2024 Dec 17, 2024 Dec 16, 2029
TETRA TECH, INC. NATIONAL ENVIRONMENTAL AND HISTORIC SUPPORT SERVICES BPA BPA $5,225,295 PUBLIC BUILDINGS SERVICE PUBLIC BUILDINGS SERVICE — 541620 Environmental Consulting Services R408 SUPPORT- PROFESSIONAL: PROGRAM MANAGEMENT/SUPPORT Oct 11, 2024 Oct 15, 2024 —
TETRA TECH, INC. — BPA $100,000,000 ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENTAL PROTECTION AGENCY — 541620 Environmental Consulting Services R499 SUPPORT- PROFESSIONAL: OTHER Sep 30, 2024 Sep 30, 2024 Sep 29, 2029
TETRA TECH, INC. — IDC $1,000,000,000 STATE, DEPARTMENT OF STATE, DEPARTMENT OF — 562910 Remediation Services R499 SUPPORT- PROFESSIONAL: OTHER Sep 5, 2024 Oct 1, 2024 Jun 30, 2030
TETRA TECH, INC. — BPA $32,976,843 ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENTAL PROTECTION AGENCY — 541620 Environmental Consulting Services U006 EDUCATION/TRAINING- VOCATIONAL/TECHNICAL Apr 12, 2024 Apr 12, 2024 Apr 7, 2029
TETRA TECH, INC. — BPA $6,453,751 ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENTAL PROTECTION AGENCY — 541620 Environmental Consulting Services F999 OTHER ENVIRONMENTAL SERVICES Mar 13, 2024 Mar 14, 2024 Sep 30, 2024
TETRA TECH, INC. — BPA $8,650,000 EXPORT-IMPORT BANK OF THE US EXPORT-IMPORT BANK OF THE US — 541620 Environmental Consulting Services F999 OTHER ENVIRONMENTAL SERVICES May 30, 2023 Jun 1, 2023 May 31, 2028
TETRA TECH, INC. NORTHWEST DIVISION AR ENGINEERING DESIGN MATOC IDC $34,000,000 DEPT OF THE ARMY US ARMY CORPS OF ENGINEERS - CIVIL PROGRAM FINANCING ONLY — 541330 Engineering Services C219 ARCHITECT AND ENGINEERING- GENERAL: OTHER May 24, 2023 May 19, 2023 May 23, 2030
TETRA TECH, INC. — BPA $7,500,000 FEDERAL ENERGY REGULATORY COMMISSION FEDERAL ENERGY REGULATORY COMMISSION — 541620 Environmental Consulting Services R499 SUPPORT- PROFESSIONAL: OTHER Apr 12, 2023 Mar 1, 2023 —
TETRA TECH, INC. — BPA $105,000,000 ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENTAL PROTECTION AGENCY — 541620 Environmental Consulting Services R425 SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL Sep 16, 2022 Sep 16, 2022 —
TETRA TECH, INC. PEER REVIEW HUMAN HEALTH HAZARD ASSESSMENTS BPA $1,000,000 CONSUMER PRODUCT SAFETY COMMISSION CONSUMER PRODUCT SAFETY COMMISSION — 541620 Environmental Consulting Services B504 SPECIAL STUDIES/ANALYSIS- CHEMICAL/BIOLOGICAL Aug 2, 2022 Aug 5, 2022 Aug 4, 2027
TETRA TECH, INC. — BPA $20,000,000 ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENTAL PROTECTION AGENCY — 541620 Environmental Consulting Services F115 ENVIRONMENTAL SYSTEMS PROTECTION- ENVIRONMENTAL CONSULTING AND LEGAL SUPPORT Feb 1, 2022 Feb 1, 2022 —
TETRA TECH, INC. — BPA $25,000,000 CENTERS FOR DISEASE CONTROL AND PREVENTION CENTERS FOR DISEASE CONTROL AND PREVENTION — 541620 Environmental Consulting Services R499 SUPPORT- PROFESSIONAL: OTHER Sep 30, 2021 Sep 30, 2021 —
TETRA TECH, INC. — IDC $52,000,000 STATE, DEPARTMENT OF STATE, DEPARTMENT OF — 541330 Engineering Services R425 SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL Sep 29, 2021 Sep 14, 2021 Sep 13, 2026
TETRA TECH, INC. — BPA $1,000,000,000 AGENCY FOR INTERNATIONAL DEVELOPMENT AGENCY FOR INTERNATIONAL DEVELOPMENT — 541620 Environmental Consulting Services R425 SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL May 26, 2021 May 26, 2021 —
TETRA TECH, INC. ADVISORY SERVICES FOR HYDROGEOLOGIC ANALYSIS/NUMERICAL GROUNDWATER FLOW MODELING, LAKE MEAD NATIONAL RECREATION AREA BPA $500,000 NATIONAL PARK SERVICE NATIONAL PARK SERVICE — 541620 Environmental Consulting Services F115 ENVIRONMENTAL SYSTEMS PROTECTION- ENVIRONMENTAL CONSULTING AND LEGAL SUPPORT Sep 4, 2020 Sep 14, 2020 Sep 13, 2025
TETRA TECH, INC. — IDC $209,000,000 DEPT OF THE ARMY US ARMY CORPS OF ENGINEERS - CIVIL PROGRAM FINANCING ONLY — 541330 Engineering Services C219 ARCHITECT AND ENGINEERING- GENERAL: OTHER Aug 4, 2020 Jul 31, 2020 Aug 3, 2025