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Department of the Interior NAICS 541611 and PSC R499 contractors

Administrative Management and General Management Consulting Services. SUPPORT- PROFESSIONAL: OTHER. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under Department of the Interior.

Department of the Interior · NAICS 541611 · PSC R499
Last updated: April 6, 2026

Visible recipients

26

Mapped obligations

$19,841,394,496

State overlap

4

Top recipients

Visible recipients in the Department of the Interior overlap of NAICS 541611 and PSC R499

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.

$864,147,658

Chickasaw Nation Industries, INC

Norman, OK

Chickasaw Nation Industries, INC is a federal 8a program participant profile based in Norman, OK. The current public data layer shows $42,168,781 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 541618 (Other Management Consulting Services). The profile also shows meaningful product and service activity in PSC AD61.

$9,256,897

Wsp USA Solutions INC

Arlington, VA

Wsp USA Solutions INC is a federal category business profile based in Arlington, VA. The current public data layer shows $37,946,568 in visible federal obligations across 227 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.

$68,053,355

Sierra7, Inc.

Mclean, VA

Sierra7, Inc. is a federal category business profile based in Mclean, VA. The current public data layer shows $35,411,480 in visible federal obligations across 141 awards or transactions. Department of Veterans Affairs appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541512 (Computer Systems Design Services). The profile also shows meaningful product and service activity in PSC DA01.

$78,234,013

Goldbelt Glacier Health Services, LLC

Herndon, VA

Goldbelt Glacier Health Services, LLC is a federal 8a program participant profile based in Herndon, VA. The current public data layer shows $34,694,720 in visible federal obligations across 69 awards or transactions. Department of Defense 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 Q201.

$132,458,795

Black & Veatch Corporation

Alpharetta, GA

Black & Veatch Corporation is a federal category business profile based in Alpharetta, GA. The current public data layer shows $32,301,941 in visible federal obligations across 5 awards or transactions. Environmental Protection Agency 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 F108.

$286,853

Goldbelt Frontier, LLC

Alexandria, VA

Goldbelt Frontier, LLC is a federal 8a program participant profile based in Alexandria, VA. The current public data layer shows $30,449,649 in visible federal obligations across 104 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 811219 (Other Electronic and Precision Equipment Repair and Maintenance). The profile also shows meaningful product and service activity in PSC J065.

$80,176,243

T And T Consulting Services Inc.

Falls Church, VA

T And T Consulting Services Inc. is a federal asian pacific american owned business profile based in Falls Church, VA. The current public data layer shows $25,177,065 in visible federal obligations across 73 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541511 (Custom Computer Programming Services). The profile also shows meaningful product and service activity in PSC R499.

$74,882,275

Michael Baker International, Inc.

Moon Township, PA

Michael Baker International, Inc. is a federal category business profile based in Moon Township, PA. The current public data layer shows $24,496,294 in visible federal obligations across 59 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.

$107,628,628

Netimpact Strategies INC

Herndon, VA

Netimpact Strategies INC is a federal asian pacific american owned business profile based in Herndon, VA. The current public data layer shows $8,904,526 in visible federal obligations across 46 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541519 (Other Computer Related Services). The profile also shows meaningful product and service activity in PSC R499.

$169,404,288
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