Department of Defense NAICS 541620 and PSC R429 contractors

Environmental Consulting Services. SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under Department of Defense.

Department of Defense · NAICS 541620 · PSC R429

Last updated: April 3, 2026

Visible recipients

Mapped obligations

$1,258,197,884

State overlap

Top recipients

Visible recipients in the Department of Defense overlap of NAICS 541620 and PSC R429

Tetra Tech, Inc.

Pasadena, CA

Tetra Tech, Inc. is a federal category business profile based in Pasadena, CA. The current public data layer shows $130,835,501 in visible federal obligations across 260 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541330 (Engineering Services). The profile also shows meaningful product and service activity in PSC C219.

$1,258,197,884