NAICS 541620 and PSC B510 contractors

Environmental Consulting Services. SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS. Cross-code contractor overlap.

NAICS 541620 + PSC B510

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$558,884,976

State overlap

Top recipients

Visible recipients in the NAICS 541620 and PSC B510 overlap

Navajo Nation

Window Rock, AZ

Window Rock, AZ | 20 awards | Top agency Department of the Treasury | NAICS 541620

$54,385,838

Hdr Environmental, Operations And Construction, Inc.

Englewood, CO

Englewood, CO | 109 awards | Top agency Department of Defense | NAICS 541330

$145,458,143

Yurok Tribe

Klamath, CA

Klamath, CA | 135 awards | Top agency Department of the Interior | NAICS 238910

$758,208

Wsp USA Solutions INC

Arlington, VA

Arlington, VA | 228 awards | Top agency Department of Defense | NAICS 541330

$84,427,302

Michael Baker International Holdco Corporation

Moon Township, PA

Moon Township, PA | 5 awards | Top agency Department of Defense | NAICS 541330

$2,553,626

Stantec Consulting Services Inc.

Denver, CO

Denver, CO | 138 awards | Top agency Department of Defense | NAICS 541330

$228,053,494

Paragon Technical Services, Inc.

Hilliard, OH

Hilliard, OH | 16 awards | Top agency Department of Energy | NAICS 561612

$39,652,362

Brown And Caldwell

San Diego, CA

San Diego, CA | 5 awards | Top agency Department of Defense | NAICS 541330

$3,507,265

Trs Group, Inc.

Indianapolis, IN

Indianapolis, IN | 5 awards | Top agency Small Business Administration | NAICS 541715

$80,000

Smithgroup Michigan Incorporated

Detroit, MI

Detroit, MI | 5 awards | Top agency Department of the Interior | NAICS 541310

$8,738

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