1 active solicitation·1 federal agency·Last refreshed Jul 10, 2026
Active opportunities in NAICS 561990
Refreshed continuously from SAM.gov and partner agencies. Showing the 1 most-urgent active solicitation.
Top primes in NAICS 561990
Federal primes ranked by total obligated dollars under NAICS 561990 over the last 5 fiscal years. Source: USAspending.gov.
#1
LOCKHEED MARTIN CORPORATION52 contracts · Department of Defense
$2.6B
#2
SALLYPORT GLOBAL HOLDINGS INC3 contracts · Department of Defense
$2.0B
#3
WASHINGTON GOVERNMENT ENVIRONMENTAL SERVICES COMPANY LLC1 contract · Department of Defense
$1.8B
#4
RAYTHEON COMPANY1 contract · Department of Defense
$1.0B
Agencies buying NAICS 561990
The top federal customers historically active in NAICS 561990by obligated dollars. Match your past performance to the agency that’s most likely to write your next contract.
#1
Department of Defense85 contracts
$10.2B
#2
Department of Energy4 contracts
$1.1B
#3
Department of State3 contracts
$860.0M
#4
Agency for International Development8 contracts
$591.0M
Frequently asked questions
What is NAICS 561990?
NAICS 561990 is the federal industry code for All Other Support Services. The Census Bureau maintains the NAICS taxonomy; federal contracting officers use it to classify solicitations and confirm bidder eligibility.
How do I bid on federal contracts as a small business in NAICS 561990?
Register your business in SAM.gov, get a UEI, and confirm your NAICS code matches the solicitation's primary NAICS. Then write a capability statement that maps your past performance to the work in the RFP. Themis automates the matching and gives you a free AI brief for every active opportunity.
Do I need a SAM.gov registration to bid?
Yes — every federal contract award above the micro-purchase threshold requires the vendor to have an active SAM.gov registration with a Unique Entity Identifier (UEI) and the relevant NAICS codes listed on the registration.
What set-asides apply to NAICS 561990?
Common federal set-asides — Small Business (SBA), 8(a), HUBZone, SDVOSB, WOSB, EDWOSB — apply per solicitation, not per NAICS code. Each opportunity declares its own set-aside; Themis displays the eligibility class on every card so you can filter to ones you qualify for.
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