USAspending.gov•SAM.gov

ECS FEDERAL, LLC

UEI XYB4JU4PA6T4 · CAGE 1T1E5 · FAIRFAX, VA · Parent: ON ASSIGNMENT, INC.

Dated source observations

SAM: Active · expires 2027-08-18 · checked 2026-11-07

Exclusions: no active exclusion record matched this UEI · as of the 2026-11-06 extract

Requests SAM.gov registration data when a refresh is available. It updates this profile but does not create a verification record.

Classifications: corporate entity not tax exempt, limited liability corporation, other than small business, partnership or limited liability partnership, us owned business

Registered address

2750 PROSPERITY AVE STE 600
FAIRFAX, VA 22031

SAM registration data · checked 2026-11-07

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Federal footprint

Historical awards

$5.5B

USAspending · prime awards

Trailing 12 months

$595.6M

USAspending · obligations

Largest agency share

46%

Department of Defense

NAICS codes

observed across awards

USAspending subawards

Name matched reported contract subawards · checked 2026-10-28.

Name matches do not establish identity. Reported subaward coverage is partial.

Awarding agencies for this contractor

This contractor's observed prime award obligations by agency · USAspending.gov · as of 2026-10-28

NAICS codes

541512$938.5M

computer systems design services

6 awards observed

541715$204M

research and development in the physical, engineering, and life sciences (except nanotechnology and biotechnology)

2 awards observed

541712$195.4M

research and development in the physical, engineering, and life sciences (except biotechnology)

2 awards observed

541713$189.9M

research and development in nanotechnology

1 award observed

541330$176.7M

engineering services

2 awards observed

541511$176.6M

custom computer programming services

1 award observed

541611$75.4M

administrative management and general management consulting services

1 award observed

541990

all other professional, scientific, and technical services

Largest prime awards· as of 2026-10-28

HC108422F0258 · Department of Defense$285.3M
47QFRA24F0012 · General Services Administration$238.7M
W911QX18C0037 · Department of Defense$189.9M
DJF151200D0003253 · Department of Justice$176.6M
47QFRA20F0024 · General Services Administration$130.1M
W911QX20C0023 · Department of Defense$120.5M
0001 · Department of Defense$105.6M
W15QKN18F0035 · Department of Defense$105.5M
N6523619F3504 · Department of Defense$104M
HC102823F0621 · Department of Defense$95.8M
W911QX17C0045 · Department of Defense$89.8M
W911QX25C0002 · Department of Defense$83.5M
47QFRA25F0001 · General Services Administration$83.2M
15F06719F0001566 · Department of Justice$75.4M
IND02PC75573 · Department of the Interior$72.7M