Systems Engineering Support Co.
Systems Engineering Support Co. (doing business as Sesco) is a small business in San Diego, CA registered on SAM.gov to bid on federal contracts. It has won about $45.9 million in federal prime contracts since fiscal year 2024, according to USAspending.gov.
- UEI
- WH4DRDKB7RR8
- CAGE code
- 03HN2
- SAM.gov registration
- Active
Registration details
| Legal business name | Systems Engineering Support Co. |
|---|---|
| Doing business as | Sesco |
| Unique Entity ID (UEI) | WH4DRDKB7RR8 |
| CAGE code | 03HN2 |
| Location | San Diego, CA |
| SAM.gov registration | Active through Jul 17, 2027 |
| Business started | 1992 |
| Primary NAICS code | 334511: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing |
| Website | www.sescoinc.com |
Certifications and business types
- Minority-owned (self-reported in SAM.gov)
- Veteran-owned (self-reported in SAM.gov)
SBA certifications let a business compete for set-aside contracts. See set-aside contracts explained.
Federal contract history
| Fiscal year | Prime contract obligations |
|---|---|
| FY2023 | $16.5 million |
| FY2024 | $9.2 million |
| FY2025 | $28.8 million |
| FY2026 | $7.9 million |
Its biggest federal customers over the last four fiscal years: Department of the Navy ($62.3 million), Defense Logistics Agency ($149,419), Federal Prison Industries / Unicor ($14,836) and Missile Defense Agency ($500).
Recent contract awards
| Awarded | Agency | What it's for | Amount |
|---|---|---|---|
| Jun 29, 2026 | Department of the Navy | Bulk buy #1 four (4) mgue configuration b variant 1 (v)4 gpnts production units, one… | $4.3 million |
| May 22, 2026 | Department of the Navy | Automated digital network system (adns) mac | $5,000 |
| Apr 9, 2026 | Defense Logistics Agency | Filter assembly,ele | $8,190 |
| Dec 19, 2025 | Missile Defense Agency | The contractor shall provide all necessary materials, labor, equipment and facilities… | $500 |
| Dec 9, 2025 | Department of the Navy | Obligation of minimum guarantee | $10,000 |
| Dec 2, 2025 | Department of the Navy | Spares #2 do #13 | $3.7 million |
Figures are prime contract obligations reported to USAspending.gov. Work done as a subcontractor isn't included.
NAICS codes Systems Engineering Support Co. is small under
On its SAM.gov registration, Systems Engineering Support Co. meets the SBA size standard for these industries, so it can bid on small business set-asides that use them.
- 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
- 332510 Hardware Manufacturing
- 332710 Machine Shops
- 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing
- 334111 Electronic Computer Manufacturing
- 334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing
- 334210 Telephone Apparatus Manufacturing
- 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
- 334290 Other Communications Equipment Manufacturing
- 334418 Printed Circuit Assembly (Electronic Assembly) Manufacturing
- 334419 Other Electronic Component Manufacturing
- 335311 Power, Distribution, and Specialty Transformer Manufacturing
- 335999 All Other Miscellaneous Electrical Equipment and Component Manufacturing
- 541330 Engineering Services
- 541511 Custom Computer Programming Services
- 541512 Computer Systems Design Services
- 541519 Other Computer Related Services
Open contracts in Systems Engineering Support Co.'s NAICS codes
673 open federal opportunities on SAM.gov use a NAICS code Systems Engineering Support Co. is small under. These are due soonest.
- NVIDIA GB300 Tower Workstation
Due in 2 daysOct 12, 2026
- BeeGFS file system licenses for 3 HPC clusters
Due in 2 daysOct 12, 2026
- Radios for Tuba City Boarding School
Due in 2 daysOct 12, 2026
- SB Set-Aside under Seaport – Battle Watch Support Services for CNIC
Due in 2 daysOct 12, 2026
- Industry Day - GPS-Enabled Monitoring Devices
Due in 2 daysOct 12, 2026
Similar small businesses
Other small businesses with the same primary NAICS code (334511) that have won federal contracts, starting with California:
- Design West Technologies Inc, Tustin, CA
- Trust Automation Inc, San Luis Obispo, CA
- Condor Pacific Industries, Inc., Newbury Park, CA
- Donatini, Inc., Santa Cruz, CA
- Chaos 1, Inc., Hawthorne, CA
- Surface Optics Corporation, San Diego, CA
Frequently asked questions
What is Systems Engineering Support Co.'s CAGE code?
Systems Engineering Support Co.'s CAGE code is 03HN2. The Defense Logistics Agency assigns CAGE codes when a business registers on SAM.gov.
What is Systems Engineering Support Co.'s UEI?
Systems Engineering Support Co.'s Unique Entity ID (UEI) is WH4DRDKB7RR8. SAM.gov assigns the UEI, and it identifies the business across the federal government.
Is Systems Engineering Support Co.'s SAM.gov registration active?
Yes, as of the latest SAM.gov public data, Systems Engineering Support Co.'s registration is active through jul 17, 2027. Registrations are renewed every year.
Is Systems Engineering Support Co. a small business?
Systems Engineering Support Co. is registered on SAM.gov as small under 17 NAICS codes, including its primary code, 334511. Size is set per NAICS code, so a business can be small for some contracts and not others.
Keep going
- Look up another business's CAGE code or UEI
- Check a SAM.gov registration's status
- How to become a government subcontractor
Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. To change these details, update the registration on SAM.gov. To ask us to remove this page, email hello@fedready.us.