Department of the Interior NAICS 541611 and PSC R499 contractors

Administrative Management and General Management Consulting Services. SUPPORT- PROFESSIONAL: OTHER. Cross-code overlap under Department of the Interior.

Department of the Interior · NAICS 541611 · PSC R499

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$25,853,022,355

State overlap

Top recipients

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

Goldbelt Glacier Health Services, LLC

Herndon, VA

Herndon, VA | 67 awards | Top agency Department of Defense | NAICS 541611

$132,458,795

Black & Veatch Corporation

Alpharetta, GA

Alpharetta, GA | 5 awards | Top agency Environmental Protection Agency | NAICS 541611

$286,853

Lower Brule Sioux Tribe

Lower Brule, SD

Lower Brule, SD | 111 awards | Top agency Department of the Interior | NAICS 541611

$1,485,598

Goldbelt Frontier, LLC

Alexandria, VA

Alexandria, VA | 105 awards | Top agency Department of Defense | NAICS 811219

$80,318,263

Inalab Consulting, Inc.

Fairfax, VA

Fairfax, VA | 136 awards | Top agency Department of Defense | NAICS 541330

$55,853,243

Chenega Professional & Technical Services LLC

Chesapeake, VA

Chesapeake, VA | 76 awards | Top agency Department of Defense | NAICS 541511

$170,946,417

T And T Consulting Services Inc.

Falls Church, VA

Falls Church, VA | 73 awards | Top agency Department of Defense | NAICS 541511

$74,882,275

Michael Baker International, Inc.

Moon Township, PA

Moon Township, PA | 58 awards | Top agency Department of Defense | NAICS 541330

$107,628,628

Ardent Management Consulting, LLC

Vienna, VA

Vienna, VA | 82 awards | Top agency Department of Homeland Security | NAICS 541511

$58,084,074

Fort Belknap Indian Community

Harlem, MT

Harlem, MT | 138 awards | Top agency Department of the Interior | NAICS 562119

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