Sphinx LLC
Clifton, VA Sphinx Part of Block 3 LLC
- UEI
- DMDDWNZL7A46
- CAGE
- 87KP4
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
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- 541690 Other Scientific and Technical Consulting Services Primary
- 238210 Electrical Contractors and Other Wiring Installation Contractors
- 332994 Small Arms, Ordnance, and Ordnance Accessories Manufacturing
- 541330 Engineering Services
- 541511 Custom Computer Programming Services
- 541512 Computer Systems Design Services
- 541513 Computer Facilities Management Services
- 541519 Other Computer Related Services
Show all
- 541611 Administrative Management and General Management Consulting Services
- 541612 Human Resources Consulting Services
- 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- 541990 All Other Professional, Scientific, and Technical Services
- 561611 Investigation and Personal Background Check Services
- 561612 Security Guards and Patrol Services
- 561613 Armored Car Services
- 561621 Security Systems Services (except Locksmiths)
- 611420 Computer Training
- 611430 Professional and Management Development Training
- 611699 All Other Miscellaneous Schools and Instruction
- 811412 Appliance Repair and Maintenance
- 812199 Other Personal Care Services
- 813920 Professional Organizations
- Corporate family
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Block 3 LLC
Parent
VEZBFC7ELGD3
-
Sphinx LLC
DMDDWNZL7A46
- Enigma International, LLC MUK8WLLLC7F4
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Sphinx LLC
DMDDWNZL7A46
-
Block 3 LLC
Parent
VEZBFC7ELGD3
- SAM.gov registration date
- Physical address
- 13702 Noble Rock Ln, Clifton, VA 20124, USA
- Website
- sphinxsecure.com
- Founded
- 2017
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
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- Industrials
- Commercial & Professional Services
- Professional Services
- Consulting
- SIC code
- 89 Services, Not Elsewhere Classified
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Scalable homeland innovative enterprise layered defense (shield) initial order. | Missile Defense Agency | $500 | |
| Minimum guarantee task order for associated seaport NXG MAC awards. | Naval Sea Systems Command | $500 | |
| Dell latitude 5510 base laptops | Office of Naval Research | $18,123 |
About Sphinx LLC
Sphinx LLC, a Virginia-based for-profit limited liability company, holds prime positions on two major defense IDIQs and a GSA Multiple Award Schedule as a full-and-open (non-set-aside) contractor, with roughly $4 billion in combined potential value concentrated in two Navy and Missile Defense Agency vehicles. Sphinx operates as a wholly owned subsidiary of Block 3 LLC, a self-certified small disadvantaged business and veteran-owned enterprise based in Maryland; Block 3 also owns Enigma International, LLC as a second subsidiary. Sphinx itself carries no SBA certifications in the source data, competing on capability and past performance rather than set-aside designation.
Sphinx's federal footprint is highly concentrated and recent. All six awards are prime contracts or IDVs issued in the past eighteen months. The Department of the Navy's Naval Sea Systems Command dominates the portfolio with two awards valued at $4 billion combined — a $4 billion Seaport Next Generation (Seaport-NXG) multiple-award IDIQ awarded January 2, 2025, and a $500 minimum-guarantee task order under that vehicle issued March 6, 2025, with ultimate completion January 1, 2029. The Missile Defense Agency contributes a $151 billion Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ awarded December 29, 2025, and a $500 delivery order under SHIELD awarded the same date, extending through December 28, 2035. The General Services Administration issued Sphinx a $1 million GSA Multiple Award Schedule (Federal Supply Schedule) contract on February 26, 2026, running through February 25, 2031, with a 24-category labor portfolio spanning IT and cybersecurity roles. The labor spectrum ranges from junior UI/UX specialists at $93.13 per hour through senior cybersecurity specialists at $261.30 per hour; all positions require a bachelor's degree minimum, and no security-cleared roles are offered. A single $18 thousand award from the Department of the Navy's Office of Naval Research rounds out the customer set.
Despite the large ceiling values on the two defense IDIQs, Sphinx has obligated only $19 thousand across all six awards — the two minimum-guarantee task orders total $1 thousand, with the remainder obligated against the GSA Schedule and the Navy research award. The SHIELD and Seaport-NXG vehicles position Sphinx to compete for task orders in research and development, systems engineering, prototyping, weapon design, production, test and evaluation, and cybersecurity modernization supporting multi-domain defense. No subcontract footprint appears in the source data; Sphinx operates exclusively as a prime.
Contract vehicles
Quick answers
What is Sphinx LLC's UEI?
Sphinx LLC's Unique Entity ID (UEI) in SAM.gov is DMDDWNZL7A46.
What is Sphinx LLC's CAGE code?
Sphinx LLC's CAGE code is 87KP4.
What is Sphinx LLC's primary NAICS code?
Sphinx LLC's primary NAICS code is 541690 (Other Scientific and Technical Consulting Services).
Where is Sphinx LLC located?
Sphinx LLC's physical address in SAM.gov is 13702 Noble Rock Ln, Clifton, VA 20124, USA.
Is Sphinx LLC registered in SAM.gov?
Yes. Sphinx LLC's SAM.gov registration is active through January 26, 2027.
Who is Sphinx LLC's parent company?
Sphinx LLC is part of Block 3 LLC.
Which contract vehicles does Sphinx LLC hold?
Sphinx LLC holds a place on 3 federal contract vehicles, including MAS, SHIELD and Seaport-NXG.
What is Sphinx LLC's most recent federal award?
Sphinx LLC's most recent federal contract award is Scalable homeland innovative enterprise layered defense (shield) initial order (HQ085926FF664), from Missile Defense Agency, on December 29, 2025.
On GovTribe
See Sphinx LLC's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Funding analysis by agency, NAICS and set-aside
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