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General Services Administration NAICS 541350 and PSC R425 contractors

Building Inspection Services. SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under General Services Administration.

General Services Administration · NAICS 541350 · PSC R425
Last updated: April 8, 2026

Visible recipients

4

Mapped obligations

$830,526,908

State overlap

3

Top recipients

Visible recipients in the General Services Administration overlap of NAICS 541350 and PSC R425

Sigma Defense Systems LLC

Perry, GA

Sigma Defense Systems LLC is a federal category business profile based in Perry, GA. The current public data layer shows $101,225,106 in visible federal obligations across 132 awards or transactions. General Services Administration appears as the strongest visible awarding agency. Top industry concentration is in NAICS 334290 (Other Communications Equipment Manufacturing). The profile also shows meaningful product and service activity in PSC R425.

$263,782,075

Karsun Solutions LLC

Herndon, VA

Karsun Solutions LLC is a federal category business profile based in Herndon, VA. The current public data layer shows $83,844,223 in visible federal obligations across 125 awards or transactions. Department of Transportation 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 R425.

$524,207,877

Ad Hoc LLC

Mclean, VA

Ad Hoc LLC is a federal category business profile based in Mclean, VA. The current public data layer shows $10,894,709 in visible federal obligations across 36 awards or transactions. Department of Health and Human Services 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 D399.

$17,460,413

Nv5 Consultants, Inc.

Saint Paul, MN

Nv5 Consultants, Inc. is a federal category business profile based in Saint Paul, MN. The current public data layer shows $66,922 in visible federal obligations across 31 awards or transactions. Department of State 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.

$25,076,543