Epsilon C5I Inc.

San Diego, CA Part of Epsilon Systems Solutions, Inc.

UEI
KFP1XYK24DZ8
CAGE
0BS45
Primary NAICS
541330 Engineering Services
SAM.gov registration
Active through

Company facts

FY2025 rankings

Its parent company, Epsilon Systems Solutions Inc., ranks:

Self-certified in SAM.gov
  • For Profit Organization
Entity structure
Corporate Entity (Not Tax Exempt)
Corporate family
SAM.gov registration date
Physical address
9370 Sky Park Ct #210, San Diego, CA 92123, USA
Founded
1998
Employees
251-1K
Estimated annual revenue
$100M-$250M
Industry
  1. Information Technology
  2. Software & Services
  3. Internet Software & Services
SIC code
73 Business Services
Profiles

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .

Contract obligations by fiscal year

Fiscal year Obligated
FY2027 To date $0
FY2026 $34,396,796
FY2025 $36,148,090
FY2024 $33,522,396
FY2023 $25,107,416

Top agencies by obligations

Rank Agency Obligated, FY2026–FY2027 Share
1 Air Force $30,052,296
2 Department of the Navy $4,264,604
3 Washington Headquarters Service $79,396
4 Missile Defense Agency $500

Contract vehicles

Expired vehicles (4)

Contract awards

Award Agency Obligated Awarded
Minimum guarantee for S2ISR MAC N6600126F9090 Naval Information Warfare Systems Command (Navy) $5,000
The performance work statement (PWS), entilted foundation and integration collection development and support… FA860426FB172 AFLCMC Wright Patterson AFB $5,008,000
The performance work statement entitled model-based systems engineering (mbse) analytic modernization, dated 15 april… FA860426FB218 AFLCMC Wright Patterson AFB $12,517,613
Scalable homeland innovative enterprise layered defense (shield) initial order. HQ085926FE188 Missile Defense Agency $500
This is a severable, level-of-effort (LOE) task order for a 12-month period of performance to provide support in… N6600126F8523 Naval Information Warfare Systems Command (Navy) $312,308

Latest 5 listed here. See the rest on GovTribe.

Contract subawards

Prime contractor Prime award Amount Awarded
Radiance Technologies Inc. THE PERFORMANCE WORK STATEMENT ENTITLED ICAM COLLECTION DEVELOPMENT AND SUPPORT, DATED 25 MARCH 2026, IS HEREBY INCORPORATED BY REFERENCE. This effort… FA860426FB159 $65,313
Not on record THE PERFORMANCE WORK STATEMENT ENTITLED GEOINT ACTIVE AND PASSIVE SUPPORT, NSC-26-006, DATED 22 JANUARY 2026 IS HEREBY INCORPORATED BY REFERENCE. This effort… FA860426FB120 $61,148
Leidos, Inc. Systems engineering, in-service engineering activity, and training services for development, production, installation, and sustainment support to the… N6523625F3003 $9,360,674
Applied Research Associates, Inc. MISSION AWARENESS CAPABILITIES RAMPUP AND OPTIMIZATION MACRO Provide personnel, materials, facilities, and management as required to complete tasks in support… 47QFCA20F0022 $563,056

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About the company

Written by GovTribe AI ·

Epsilon C5I Inc., a 100% employee-owned subsidiary of Epsilon Systems Solutions Inc., provides command, control, communications, computers, cybersecurity, and intelligence (C5I) systems development, research and development, and technical intelligence analysis to the Department of Defense and intelligence agencies as a prime contractor (97% of recent awards), competing predominantly full-and-open with no recurring set-aside posture despite holding several small-business set-aside delivery orders on parent IDIQs.

The vendor is headquartered in San Diego, California and operates across engineering services and defense R&D domains under primary NAICS 541512 (Computer Systems Design Services) and 541710 (Research and Development in the Physical, Engineering, and Life Sciences). Customer concentration heavily favors Navy and Air Force intelligence and ISR programs. The Naval Information Warfare Systems Command leads by award count with 36 awards worth $969.7 million combined potential value; the Air Force's National Air and Space Intelligence Center follows with 14 awards anchoring $4.86 billion in potential value; the Naval Air Warfare Center and Naval Sea Systems Command round out the top tier. Naval Sea Systems Command carries exceptional leverage: three awards (likely including the SeaPort-e vehicle work) represent $72.55 billion of the vendor's combined $78.89 billion total pipeline — a single customer concentration spike driven by platform engineering and sustainment work rather than R&D volume. Epsilon C5I holds a seat on the $151 billion SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) multiple-award IDIQ awarded by the Missile Defense Agency on December 29, 2025, in addition to the $4.8 billion NOVASTAR multiple-award IDIQ with the National Air and Space Intelligence Center, a $169 million Enterprise Personnel Systems Engineering IDC with Naval Information Warfare Systems Command, a $249 million Joint Artificial Intelligence Center Test and Evaluation BPA with the Office of the Secretary of Defense, and the multi-billion-dollar SeaPort-e vehicle under which the Naval Sea Systems Command exposure sits.

Recent prime capability work includes a $3.99 million Air Force delivery order for space-based ISR analysis under NOVASTAR (September 2025), an $18.5 million Office of Naval Research definitive contract for Tactical Applications for Containerized Knowledge and Logistics Execution (August 2025), a $14.9 million Naval Information Warfare Systems Command delivery order for Test Automation Framework engineering and technical support under the Enterprise Personnel Systems Engineering vehicle (February 2025), a $1.7 million NOVASTAR delivery order for GEOINT Scene Prediction R&D from the National Air and Space Intelligence Center (September 2025), and a $6.2 million NOVASTAR delivery order for Special Mission, Fighter, Bomber aircraft analysis (July 2024). The vendor also holds multiple Small Business Innovation Research Phase III delivery orders with the Naval Air Warfare Center: a $11.96 billion ceiling delivery order (June 2025, under total small business set-aside), and predecessor Phase III orders valued at $17.1 million (September 2023, through September 2024) and $6.9 million (September 2022, through December 2023), all performed in San Diego. Activity has grown from six awards in 2022 to fourteen in 2025, with fourteen awards (combined potential value $88.2 million) scheduled to complete within the next twenty-four months and therefore facing recompete exposure.

Across SCI-reportable service contracts, the vendor invoiced $3.6 million in FY2024 across 11.7 FTEs, reflecting a government-paid rate of $145.63 per hour. On these prime contracts, Epsilon C5I subcontracted 59% of reported contractor hours to five named subcontractors, indicating a reliance on sub capacity for mission execution. Named sub work includes systems engineering, in-service engineering activity, and training services under Leidos (Distributed Common Ground Station Navy sustainment, April 2025) and mission awareness capabilities work under Applied Research Associates (December 2023).

Epsilon C5I operates as a prime on full-and-open competition vehicles (SHIELD, OASIS+ Unrestricted, SeaPort-e) and holds competitive and set-aside positions on NOVASTAR and the Naval Air Warfare Center SBIR Phase III vehicle. The vendor's recent activity split — 14 awards per year in 2025, with a $78.89 billion combined pipeline concentrated in Navy and Air Force intelligence platforms — reflects a defense and intelligence customer base with sustained R&D and platform sustainment demand, offset by extreme concentration risk in a single Naval Sea Systems Command relationship.

SBA capabilities narrative

From the vendor's SBA profile

Software & systems engineering support for C4ISR, digital signal processing (DSP), cryptology/information operations, and defense communications systems.

Quick answers

Is Epsilon C5I Inc. registered in SAM.gov?

Yes. Epsilon C5I Inc.'s SAM.gov registration is active through February 4, 2027.

Which contract vehicles does Epsilon C5I Inc. hold?

Epsilon C5I Inc. holds a place on 10 federal contract vehicles, including EPSE, Intelligence, Surveillance, Reconnaissance, and Targeting and NOVASTAR.

How much has Epsilon C5I Inc. received in federal contracts?

Federal contracts obligated $36,148,090 to Epsilon C5I Inc. in fiscal year 2025 and $129,174,697 in fiscal years 2023 through 2027.

How does Epsilon C5I Inc. rank among federal contractors?

Epsilon C5I Inc.'s parent company, Epsilon Systems Solutions Inc., ranked #10 in PSC R423 and #33 in PSC AC14 in FY2025.

What is Epsilon C5I Inc.'s most recent federal award?

Epsilon C5I Inc.'s most recent federal contract award is Minimum guarantee for S2ISR MAC (N6600126F9090), from Naval Information Warfare Systems Command (Navy), on July 9, 2026.

On GovTribe

See Epsilon C5I Inc.'s full federal record

  • Federal contract awards
  • IDV awards
  • Contract vehicles
  • Subcontracting relationships
  • Funding analysis by agency, NAICS and set-aside
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