Agency + NAICS page

Department of the Interior 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 the Interior.

Agency: Department of the Interior
Last updated: April 8, 2026

Visible recipients

25

Mapped obligations

$1,361,094,942

Top PSC links

4

Top recipients

Visible recipients tied to Department of the Interior and NAICS 541620

Icf Incorporated

Fairfax, VA

Icf Incorporated is a federal government profile based in Fairfax, VA. The current public data layer shows $5,505,384 in visible federal obligations across 5 awards or transactions. Department of Health and Human Services appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541611 (Administrative Management and General Management Consulting Services). The profile also shows meaningful product and service activity in PSC R499.

$387,719,464

Brown And Caldwell

San Diego, CA

Brown And Caldwell is a federal category business profile based in San Diego, CA. The current public data layer shows $3,910,103 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 C211.

$2,330,004

Atkins North America, Inc.

Dallas, TX

Atkins North America, Inc. is a federal category business profile based in Dallas, TX. The current public data layer shows $732,372 in visible federal obligations across 8 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 C211.

$4,536,281

Smithgroup Michigan Incorporated

Detroit, MI

Smithgroup Michigan Incorporated is a federal category business profile based in Detroit, MI. The current public data layer shows $274,279 in visible federal obligations across 5 awards or transactions. Department of the Interior appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541310 (Architectural Services). The profile also shows meaningful product and service activity in PSC C130.

$4,369

Integral Consulting Inc.

Boulder, CO

Integral Consulting Inc. is a federal category business profile based in Boulder, CO. The current public data layer shows $218,454 in visible federal obligations across 9 awards or transactions. Department of Energy appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541620 (Environmental Consulting Services). The profile also shows meaningful product and service activity in PSC F105.

$1,227,291
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