Department of Health and Human Services NAICS 541620 contractors

Environmental Consulting Services. Use this buyer-scoped industry page to see which visible contractors sit closest to this NAICS lane under Department of Health and Human Services.

Agency: Department of Health and Human Services

Last updated: April 8, 2026

Visible recipients

Mapped obligations

$1,369,217,340

Visible recipients tied to Department of Health and Human Services and NAICS 541620

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.

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