Department of Homeland Security NAICS 541620 and PSC R424 contractors

Environmental Consulting Services. SUPPORT- PROFESSIONAL: EXPERT WITNESS. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under Department of Homeland Security.

Department of Homeland Security · NAICS 541620 · PSC R424

Last updated: April 7, 2026

Visible recipients

Mapped obligations

$1,839,582

State overlap

Top recipients

Visible recipients in the Department of Homeland Security overlap of NAICS 541620 and PSC R424

Halff Associates, Inc.

Richardson, TX

Halff Associates, Inc. is a federal category business profile based in Richardson, TX. The current public data layer shows $247,820 in visible federal obligations across 5 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 C1JZ.

$1,839,582