Department of the Interior NAICS 813920 contractors

Professional Organizations. Use this buyer-scoped industry page to see which visible contractors sit closest to this NAICS lane under Department of the Interior.

Agency: Department of the Interior

Last updated: April 5, 2026

Visible recipients

Mapped obligations

$14,495,236

Visible recipients tied to Department of the Interior and NAICS 813920

The Lewin Group, Inc.

La Crosse, WI

The Lewin Group, Inc. is a federal category business profile based in La Crosse, WI. The current public data layer shows $46,392,453 in visible federal obligations across 82 awards or transactions. Department of Health and Human Services appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541720 (Research and Development in the Social Sciences and Humanities). The profile also shows meaningful product and service activity in PSC R499.

$14,495,236