Federal contractor · SAN DIEGO, CA

EPSILON C5I INC

EPSILON C5I INC received $21.9M in federal contract obligations in FY2026, on 14 awards (−39% vs FY2025). Since FY2017: $146.3M. Its largest customer was Department of the Air Force ($17.5M).

Obligations · FY2026
$21.9M
New awards
14
Sole-source
0.0%
Single offer
20%
UEI
KFP1XYK24DZ8
Parent company
EPSILON SYSTEMS SOLUTIONS, INC.
Small business
Open in the contracts explorerRelationship graph

Company family

Grouped from reported parent companies (UEI) and, where marked, AI judgments that two records name the same organization or group.

Part of the EPSILON SYSTEMS SOLUTIONS INC company family: 5 registered entities, $188.9M in FY2026 together. See the family

  1. EPSILON SYSTEMS SOLUTIONS INCPORTSMOUTH, VA · Family page
    $134.7M
  2. EPSILON SYSTEMS SOLUTIONS, INC.SAN DIEGO, CA
    $32.3M
  3. EPSILON SYSTEMS SOLUTIONS MISSION SOLUTIONS GROUP, INCSAN DIEGO, CA
    $0
  4. EPSILON SYSTEMS SOLUTIONS, INCCHESAPEAKE, VA
    $0

AI-inferred: entity-match@1 · Analisa AI · 2026-10-05

Spending by fiscal year

Obligations per federal fiscal year (October–September).

  1. 380.5KFY2017
  2. 1.2MFY2018
  3. 5.1MFY2019
  4. 5.7MFY2020
  5. 5.1MFY2021
  6. 12.1MFY2022
  7. 25.1MFY2023
  8. 33.5MFY2024
  9. 36.1MFY2025
  10. 21.9MFY2026

Top buying agencies

Obligations in FY2026.

  1. Department of the Air Force$17.5M80%
    9 awards
  2. Department of the Navy$4.3M20%
    4 awards
  3. Missile Defense Agency$5000.0%
    1 awards

What was bought · Where the work was performed

Obligations in FY2026.

What was bought

  1. Professional services$17.5M80%
  2. Research & development$4M18%
  3. Equipment maintenance$312.3K1.4%

Where the work was performed

  1. Greene County, OH$17.5M80%
  2. San Diego County, CA$4.3M20%
  3. Madison County, AL$5000.0%

Integrity signals

Shares of the year's obligations, next to the country's.

  • Low competition20%
    US 39% · $4.3M
  • Sole-source awards0.0%
    US 30% · $0
  • Single-offer competitions20%
    US 8.7% · $4.3M
  • Urgency justifications0.0%
    US 5.1% · $0

A signal is a reason to look closer, not evidence of wrongdoing: most sole-source awards are lawful and justified.

Largest awards

  1. NOVASTAR, NATIONAL AIR AND SPACE INTELLIGENCE CENTER SCIENCE AND TECHNICAL ANALYTIC CAPABILITY SUPPORT$13M
    Department of the Air Force· Greene County, OH· Professional services· Aug 18, 2023 – Mar 12, 2026· FA860423FB317
  2. 25F0340 SBIR 3 N101-100$11M
    Department of the Navy· San Diego County, CA· Research & development· Jun 11, 2025 – Jun 8, 2026· N6893625F0340
  3. NOVASTAR, NATIONAL AIR AND SPACE INTELLIGENCE CENTER SCIENCE AND TECHNICAL INTELLIGENCE ANALYTIC CAPABILITY SUPPORT$9.8M
    Department of the Air Force· Greene County, OH· Professional services· Jan 26, 2024 – Mar 31, 2026· FA860424FB047
  4. NOVASTAR, NATIONAL AIR AND SPACE INTELLIGENCE CENTER SCIENCE AND TECHNICAL INTELLIGENCE ANALYTIC CAPABILITY SUPPORT CONTRACT$5.1M
    Department of the Air Force· Greene County, OH· Professional services· Sep 26, 2023 – Mar 13, 2026· FA860423FB417
  5. THE PERFORMANCE WORK STATEMENT (PWS), ENTILTED FOUNDATION AND INTEGRATION COLLECTION DEVELOPMENT AND SUPPORT, REVISION 1, NSC-26-014, DATED 30 MARCH 2026, IS HEREBY INCORPORATED BY REFERENCE.$5M
    Department of the Air Force· Greene County, OH· Professional services· May 15, 2026 – May 15, 2026· FA860426FB172
  6. TEST AUTOMATION FRAMEWORK (TAF) ENGINEERING AND TECHNICAL SUPPORT$4.7M
    Department of the Navy· San Diego County, CA· Research & development· Jan 22, 2025 – Apr 15, 2026· N6600125F0138
  7. NOVASTAR, NATIONAL AIR AND SPACE INTELLIGENCE CENTER SCIENCE AND TECHNICAL INTELLIGENCE ANALYTIC CAPABILITY SUPPORT CONTRACT$4.5M
    Department of the Air Force· Greene County, OH· Professional services· Feb 16, 2024 – Jan 6, 2026· FA860424FB077
  8. THE PERFORMANCE WORK STATEMENT ENTITLED RAPID PERFORMANCE WEAPONS MODELING, DATED 13 JUNE 2024, IS HEREBY INCORPORATED BY REFERENCE.$2.5M
    Department of the Air Force· Greene County, OH· Professional services· Aug 13, 2024 – Jan 21, 2026· FA860424FB290

Subawards

Matched by Unique Entity ID: the first-tier subawards this organization reported as a prime recipient, and those primes reported paying it.

As a prime: who it pays · FY2026

No subawards reported as a prime in FY2026.

As a sub-recipient: who pays it · FY2026

  • Sub-contracts: $126.5K (2 subawards)

1 prime

  1. RADIANCE TECHNOLOGIES INC$126.5K100%
    HUNTSVILLE, AL · 2 subawards

By fiscal year

  • FY2022: $0 paid out · $225.6K received
  • FY2023: $0 paid out · $1.5M received
  • FY2024: $0 paid out · $563.1K received
  • FY2025: $0 paid out · $9.4M received
  • FY2026: $0 paid out · $126.5K received

Primes report first-tier subawards of $30,000 or more themselves, and many go unreported (GAO-24-106214). Reporting moved from FSRS to SAM.gov in March 2025 and fewer sub-contracts have been reported since. Amounts are what primes reported; they are never added to prime award totals.

Source: Subawards (first-tier sub-contracts and sub-grants reported under FFATA) (U.S. Department of the Treasury, USAspending.gov (reports filed in SAM.gov, formerly FSRS)), data current to Oct 9, 2026, loaded Oct 9, 2026 · Subawards loaded from FY2021.

Teaming partners

Companies this company reported paying, primes that reported paying it, from FFATA subaward reports.

Companies it pays

131 companies · $89.5M reported

  1. NAVAL ENGINEERING SUPPORT INC$9.7M
    NATIONAL CITY, CA · 96 subawards · Ship and boat building
  2. DUKE MARINE ENGINEERING CONSULTING, INC.$6.6M
    STUART, FL · 18 subawards · Ship and boat building
  3. KROS-WISE$5.7M
    SAN MARCOS, CA · 3 subawards · Architectural, engineering, and related services

Primes that pay it

27 companies · $71.4M reported

  1. ELECTRIC BOAT CORPORATION$25M
    GROTON, CT · 45 subawards · Ship and boat building
  2. HUNTINGTON INGALLS INCORPORATED$9.9M
    PASCAGOULA, MS · 73 subawards · Ship and boat building
  3. LEIDOS, INC.$9.9M
    RESTON, VA · 3 subawards · Architectural, engineering, and related services

Showing the top 3 of each list. Open the profile for potential partners and the full lists.

Primes report first-tier subawards of $30,000 or more themselves, and many go unreported (GAO-24-106214). Reporting moved from FSRS to SAM.gov in March 2025 and fewer sub-contracts have been reported since. Amounts are what primes reported; they are never added to prime award totals.

Source: Subawards (first-tier sub-contracts and sub-grants reported under FFATA) (U.S. Department of the Treasury, USAspending.gov (reports filed in SAM.gov, formerly FSRS)), data current to Oct 9, 2026, loaded Oct 9, 2026 · Subawards loaded from 2021.

Competitors

Companies that win from the same buyers in the same markets: obligations by agency and industry compared over the last three fiscal years.

Compared on 14 markets (agency × industry), FY2024–FY2026.

  1. NORTHSTAR MARITIME DISMANTLEMENT SERVICES, LLC$533.7M−100% in FY2026
    VERNON, VT · 73% of this company's obligations are in markets they both serveNavy · Ship and boat building
  2. EAST COAST REPAIR & FABRICATION, LLC$395.1M−2.7% in FY2026
    NEWPORT NEWS, VA · 64% of this company's obligations are in markets they both serveNavy · Ship and boat building
  3. MARINETTE MARINE CORPORATION$464.6M−657% in FY2026
    MARINETTE, WI · 3 entities · 66% of this company's obligations are in markets they both serveNavy · Ship and boat building

Showing the top 3 of 25 competitors. Open the profile for the full list.

Who sells to the same buyers in the same markets, not who wins against whom on a given contract. Prime contract obligations by the agency and NAICS code of each award; subawards are never added. A company is a family of legal entities, joined by parent UEI or, in part, by an AI reading of names.

Source: Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov), data current to Oct 9, 2026, loaded Oct 9, 2026 · FY2024–FY2026.

Source: Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov), data current to Oct 9, 2026, loaded Oct 9, 2026.