NAICS 541620 and PSC R424 contractors

Environmental Consulting Services. SUPPORT- PROFESSIONAL: EXPERT WITNESS. Cross-code contractor overlap.

NAICS 541620 + PSC R424

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$5,852,305

State overlap

Top recipients

Visible recipients in the NAICS 541620 and PSC R424 overlap

Coeur D'alene Tribe

Plummer, ID

Plummer, ID | 108 awards | Top agency Department of the Interior | NAICS 541620

Halff Associates, Inc.

Richardson, TX

Richardson, TX | 5 awards | Top agency Department of Defense | NAICS 541330

Integral Consulting Inc.

Boulder, CO

Boulder, CO | 9 awards | Top agency Department of Energy | NAICS 541620

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