NAICS 541620 — ENVIRONMENTAL CONSULTING SERVICES
Federal contract awards classified under NAICS code 541620 (ENVIRONMENTAL CONSULTING SERVICES) cover 2,253 unique federal contracts (2,860 total action records) from USASpending.gov. The top contractors, awarding agencies, and geographic concentration below are aggregated from the highest-value awards in this market — the right view for sizing competition and identifying incumbents.
Top Contractors in NAICS 541620
Largest recipients of federal contract dollars in this NAICS code (ranked by total obligated value). These are the incumbent competitors to know if you sell into this market.
| Contractor | Awards | Total Obligated |
|---|---|---|
| TETRA TECH, INC. | 107 | $283.1M |
| PROJECT ENHANCEMENT CORPORATION | 4 | $169.2M |
| WESTON SOLUTIONS INC | 40 | $146.8M |
| HSG, LLC | 4 | $145.5M |
| EASTERN RESEARCH GROUP INC | 88 | $144.7M |
| S C & A INC | 19 | $68.3M |
| GRYPHON ENVIRONMENTAL, LLC | 1 | $45.0M |
| THE CADMUS GROUP LLC | 29 | $42.2M |
| ICF INCORPORATED, L.L.C. | 21 | $39.7M |
| VERNADERO GROUP INC | 8 | $38.4M |
Top Awarding Agencies
Federal agencies that obligate the most spending in NAICS 541620. Click any agency to see its full contract portfolio, top contractors, and sub-agencies.
| Agency | Awards | Total Obligated |
|---|---|---|
| Environmental Protection Agency | 430 | $946.4M |
| National Aeronautics and Space Administration | 38 | $237.9M |
| Department of Energy | 45 | $237.0M |
| Department of Commerce | 43 | $136.4M |
| Department of Homeland Security | 41 | $116.4M |
| Department of the Interior | 113 | $99.6M |
| General Services Administration | 24 | $99.3M |
| Department of Defense | 56 | $48.3M |
| Department of Justice | 7 | $23.0M |
| Department of Veterans Affairs | 33 | $20.5M |
Geographic Concentration
States where NAICS 541620 contract work is performed, ranked by total obligated value. Useful for sizing the local market and identifying state-level competitors.
| State | Awards | Total Obligated |
|---|---|---|
| VA | 107 | $235.0M |
| DC | 65 | $232.6M |
| MA | 102 | $204.5M |
| MD | 54 | $135.9M |
| CA | 65 | $124.9M |
| PA | 28 | $94.5M |
| AZ | 25 | $81.5M |
| IL | 19 | $78.6M |
| WA | 55 | $75.2M |
| FL | 39 | $68.8M |
Most Recent Awards
GEOSYSTEMS ANALYSIS, INC
ENVIRONMENTAL MONITORING SERVICES (MSCP)
GEOSYSTEMS ANALYSIS, INC
ENVIRONMENTAL MONITORING SERVICES (MSCP)
EASTERN RESEARCH GROUP INC
STRENGTHENING MEXICAN EMISSIONS INVENTORIES AND RELATED CAPACITY TO SUPPORT THE BORDER 2025 PROGRAM AIR OBJECTIVES AND IMPROVE UNDERSTANDING OF MEXICO-U.S. TRANSBOUNDARY AIR POLLUTION POC ANTONIO LEATHERS TOCOR CARRIE WHEELER ALT. TOCOR NAME: PA
OREGON STATE UNIVERSITY
FOREST GENETICS SUPPORT TI DATA
HARTGEN ARCHEOLOGICAL ASSOCIATES, INC.
ARCHEOLOGICAL INVENTORY AT UPDE
All Unique Contracts in NAICS 541620
Showing 901 unique contracts (one entry per PIID, deduped from modifications) sorted by total dollars obligated.
INDEPENDENT STRATEGIC MANAGEMENT SOLUTIONS INC
THIS BPA CALL WILL BE PLACED AGAINST BPA 89303923AEM000019 WITH INDEPENDENT STRATEGIC MANAGEMENT SOLUTIONS, INC. FOR NUCLEAR SAFETY SUPPORT IN ACCORDANCE WITH THE STATEMENT OF WORK.
S C & A INC
PROVIDE PERSONNEL AND RESOURCES TO SUPPORT PREPARATION OF A SITE WIDE EIS (SWEIS) ANALYSIS FOR CONTINUED OPERATIONS AND PROJECTED PROGRAMS AT SNL/NM FOR ENVIRONMENTAL CONSULTING SUPPORT SERVICES.
ENVIRONMENTAL MANAGEMENT & PLANNING SOLUTIONS LLC
FEASIBILITY REPORT AND EIS - VRSMP
CONSOLIDATED SAFETY SERVICES INCORPORATED
SCIENTIFIC AND TECHNICAL SUPPORT SERVICES FOR SDI
RPI-CSS, LLC
ASTSS CALL ORDER MARINE SPATIAL ECOLOGY (MSE) DIVISION; PACKAGE OR-25-00946 APPROVED ON JUNE 28, 2025.
VANASSE HANGEN BRUSTLIN INC
ECCD SUPPORT CONTRACT
LYNKER CORPORATION
HAWAII REGION SANCTUARY SUPPORT SERVICES
PROJECT ENHANCEMENT CORPORATION
U.S. DEPARTMENT OF ENERGY, NATIONAL NUCLEAR SECURITY ADMINISTRATION'S (DOE/NNSA) TECHNICAL, ENGINEERING, AND PROGRAMMATIC SUPPORT SERVICES II (TEPS II) BLANKET PURCHASE AGREEMENT (BPA) GOVERNANCE AND MANAGEMENT (G&M) AND ENTERPRISE WIDE STRA
VERNADERO GROUP INC
ARMY NATIONAL GUARD GEOSPATIAL PROGRAM SUPPORT
TETRA TECH, INC.
TECHNICAL SUPPORT SERVICES FOR NATIONAL ENVIRONMENTAL POLICY ACT COMPLIANCE ASSOCIATED WITH THE PIT PRODUCTION PROGRAM FOR DEPARTMENT OF ENERGY NATIONAL NUCLEAR SECURITY ADMINISTRATION OFFICE OF ENVIRONMENT SAFETY AND HEALTH
WESTON SOLUTIONS INC
START V BASE TASK ORDER: CORE RESPONSE TEAM FOR CONTRACT YEAR 4.
TETRA TECH, INC.
REGION 5, SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM VI (START VI), TASK ORDER FOR REMOVAL ACTIVITIES.
RPI-CSS, LLC
ASTSS CALL ORDER STRESSOR DETECTION AND IMPACTS (SDI) DIVISION; PACKAGE OR-25-00944 APPROVED ON JUNE 28, 2025.
AECOM TECHNICAL SERVICES, INC.
ENVIRONMENTAL CONSULTING SERVICES AIR SPARGE INTERIM MEASURE AT WILSON CORNERS.
RMEC ENVIRONMENTAL INC
ARNG INDUSTRIAL HYGIENE NORTHEAST REGION TIER 1 AND 2 SERVICES
TETRA TECH, INC.
TECHNICAL SUPPORT SERVICES FOR NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) COMPLIANCE ASSOCIATED WITH THE LOS ALAMOS NATIONAL LABORATORY
TOEROEK ASSOCIATES, INC.
TARGETED BROWNFIELDS ASSESSMENT SUPPORT 2
HSG, LLC
ENVIRONMENTAL SUPPORT SERVICES FOR LANGLEY RESEARCH CENTER.
TETRA TECH, INC.
EMERGENCY RESPONSE ACTIVITIES
TRINITY ANALYSIS AND DEVELOPMENT CORP.
ENVIRONMENTAL SERVICES F2F FOR EGLIN AFB, HURLBURT FIELD, AND TYNDALL AFB
TETRA TECH, INC.
SERVICE AND SUPPORT FOR AIR SPARGE INTERIM MEASURE ACTIVITIES AT FORMER CENTRAL HEAT PLANTKENNEDY SPACE CENTER, FLORIDA
TETRA TECH, INC.
INITIATE SITE-SPECIFIC TASK ORDER (ASSESSMENT/INSPECTION ACTIVITIES) FOR WESTSIDE LEAD REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RIFS) UNDER START V CONTRACT 68HE0519D0006.
BLUESTONE - BURNS & MCDONNELL JV
MULTI-SITE PRELIMINARY ASSESSMENTS AND SITE INVESTIGATIONS OF UNITED STATES DEPARTMENT OF AGRICULTURE (USDA) FORMER GRAIN STORAGE SITES THROUGHOUT KANSAS
EASTERN RESEARCH GROUP INC
HQ SECURITY SUPPORT SERVICES, OFFICE OF ADMINISTRATION (OA)
WSP USA ENVIRONMENT & INFRASTRUCTURE INC.
NEW AWARD MAINTENANCE AND ENHANCEMENTS OF THE AMERICAN METEOROLOGICAL SOCIETY/ENVIRONMENTAL PROTECTION AGENCY (AMS/EPA) REGULATORY MODEL (AERMOD) MODELING SYSTEM (APP-OAR-20-00008)