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NAICS 541620 federal contractors and awards

Environmental Consulting Services. Use this page to find visible federal contractors, agencies, and federal award concentration tied to this industry code.

Category code: 541620
Last updated: April 5, 2026

Visible recipients

17

Mapped obligations

$2,669,141,599

Buyer overlap

5

Category overview

How to use this NAICS page

Find the main contractors

Use the recipient list below when the goal is to see which companies show the clearest public footprint in this industry code.

Find the main buyers

Use buyer overlap in the sidebar to move from industry code to agencies that appear most often around this lane.

Branch into deeper profiles

Recipient and agency links are the fastest next click when this code is only the starting point for broader market research.

Top recipients

Recipients most visible in this category

Tetra Tech Ec, Inc.

San Diego, CA

Top buyer: Department of DefenseRecent award: 2025-12-09
$24,808,110

Icf Incorporated, L.l.c.

Reston, VA

Top buyer: Department of Health and Human ServicesRecent award: 2026-04-01
$387,823,031

Weston Solutions INC

West Chester, PA

Top buyer: Department of DefenseRecent award: 2026-03-11
$531,028,453

Ahtna Facility Services, Incorporated

Anchorage, AK

Top buyer: Department of EnergyRecent award: 2021-02-17
$1,113,678

Olgoonik Diversified Services LLC

Colorado Springs, CO

Top buyer: Department of DefenseRecent award: 2022-01-13
$1,450,252

Tetra Tech, Inc.

Pasadena, CA

Top buyer: Department of DefenseRecent award: 2026-03-31
$982,433,526

Nv5 Geospatial, Inc.

Saint Petersburg, FL

Top buyer: Department of the InteriorRecent award: 2026-03-31
$17,872,558

Cdm Smith Inc.

Carlsbad, CA

Top buyer: Department of DefenseRecent award: 2026-02-23
$5,672,128

Wsp USA Environment & Infrastructure Inc.

Blue Bell, PA

Top buyer: Department of DefenseRecent award: 2026-03-06
$165,926,652

Wsp USA Solutions INC

Arlington, VA

Top buyer: Department of DefenseRecent award: 2026-03-27
$55,806,546

Redhorse Corporation

Arlington, VA

Top buyer: Department of DefenseRecent award: 2025-12-29
$23,825,026

Lime Energy Services Co.

Huntersville, NC

Top buyer: Department of DefenseRecent award: 2012-09-30
$0

Mantech-aecom Joint Venture

Herndon, VA

Top buyer: Department of DefenseRecent award: 2022-08-09
$25,386,140

Ahtna Global LLC

Anchorage, AK

Top buyer: Department of DefenseRecent award: 2025-09-25
$5,316,878

Clean Harbors Environmental Services INC

Norwell, MA

Top buyer: Department of AgricultureRecent award: 2026-04-25
$39,681,717

Aecom International Inc.

Frankfurt Am Main

Top buyer: Department of DefenseRecent award: 2026-01-01
$13,173,873

Icf Incorporated

Fairfax, VA

Top buyer: Department of Health and Human ServicesRecent award: 2026-04-01
$387,823,031