NAICS + PSC page

NAICS 541620 and PSC D399 contractors

Environmental Consulting Services. IT AND TELECOM- OTHER IT AND TELECOMMUNICATIONS. Use this cross-code page to see which visible federal contractors sit in the overlap between these two public category lanes.

NAICS 541620 + PSC D399
Last updated: April 8, 2026

Visible recipients

4

Mapped obligations

$1,576,930,903

State overlap

0

Top recipients

Visible recipients in the NAICS 541620 and PSC D399 overlap

Icf Incorporated, L.l.c.

Reston, VA

Icf Incorporated, L.l.c. is a federal category business profile based in Reston, VA. The current public data layer shows $271,970,237 in visible federal obligations across 1,306 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.

$734,509,799

Redhorse Corporation

Arlington, VA

Redhorse Corporation is a federal category business profile based in Arlington, VA. The current public data layer shows $30,311,976 in visible federal obligations across 101 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 611430 (Professional and Management Development Training). The profile also shows meaningful product and service activity in PSC R499.

$99,416,828

Advanced Technologies And Laboratories (atl) International, Inc.

Gaithersburg, MD

Advanced Technologies And Laboratories (atl) International, Inc. is a federal asian pacific american owned business profile based in Gaithersburg, MD. The current public data layer shows $7,100,166 in visible federal obligations across 36 awards or transactions. Department of Energy appears as the strongest visible awarding agency. Top industry concentration is in NAICS 562910 (Remediation Services). The profile also shows meaningful product and service activity in PSC M300.

$8,494,477

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.

$734,509,799