Cardinal Engineering, LLC
Cardinal Engineering, LLC is a small business in Washington, DC registered on SAM.gov to bid on federal contracts. It has won about $11.2 million in federal prime contracts since fiscal year 2024, according to USAspending.gov's award records for its UEI, $9 million of it on contracts where it counted as a small business.
- UEI
- C6KWNDH3EEB5
- CAGE code
- 5YS97
- SAM.gov registration
- Active
Federal contract history
| Fiscal year | Obligated, prime contracts |
|---|---|
| FY2024 | $3.8 million |
| FY2025 | $3.8 million |
| FY2026 (incomplete) | $3.7 million |
FY2026 is still incomplete and will rise until about early January 2027 as Defense data arrives: USAspending.gov publishes Defense contracts 90 days after they're signed.
These are every prime contract USAspending.gov records under UEI C6KWNDH3EEB5, from its award search. For a company that is part of a parent company, USAspending's recipient page can show a different figure for a year, because it counts the company's own record and its parent's record separately.
Its biggest federal customers since fiscal year 2024: Department of the Navy ($9.5 million) and Department of the Air Force ($1.8 million).
Recent contract awards
New contracts, by the date each was first signed. Orders and changes to older contracts count in the yearly totals above but aren't listed here, and Defense awards appear 90 days after signing.
| Awarded | Agency | What it's for | Obligated |
|---|---|---|---|
| Jan 28, 2026 | Department of the Navy | Low complexity reviews (PWS 3.1) | $428,400 |
| May 27, 2025 | Department of the Navy | Kickoff briefing | $139,990 |
| Apr 28, 2025 | Department of the Air Force | Returning exoatmospheric unique is noval (RETURN) | $1.8 million |
| Apr 8, 2025 | Department of the Navy | Low complexity reviews (PWS 3.1) | $247,930 |
| Apr 4, 2025 | Department of the Navy | Low complexity reviews (PWS 3.1) | $66,730 |
| Mar 27, 2025 | Department of the Navy | Submarine shock review service | $99,988 |
Figures are prime contract obligations reported to USAspending.gov. Subcontract work is listed separately below.
Subcontract work reported by primes
Prime contractors reported 17 subcontracts to it worth about $20.5 million in the last five years, according to USAspending.gov. Primes only have to report subcontracts of $40,000 or more (since October 1, 2025; $30,000 before that), so smaller jobs are missing. Amounts are net of any cuts primes reported. None of this is in the prime contract figures.
| Prime contractor | For | Subcontracts | Amount | Latest |
|---|---|---|---|---|
| CACI, Inc. - Federal | Department of the Air Force | 3 | $6.6 million | Apr 3, 2025 |
| Seacorp, LLC | Defense Contract Management Agency, Department of the Navy | 5 | $6.4 million | May 14, 2025 |
| Science Applications International Corporation | Department of the Navy | 2 | $4.9 million | Jan 16, 2025 |
| Florida State University | Department of the Navy | 1 | $1.2 million | Mar 17, 2025 |
| Rite-Solutions, Inc. | Department of the Navy | 1 | $987,813 | Mar 15, 2024 |
| Noblis MSD, LLC | Department of the Navy | 3 | $219,011 | Feb 11, 2025 |
| McKean Defense Group, LLC | Defense Contract Management Agency | 2 | $159,709 | Apr 22, 2022 |
SBIR and STTR awards
Cardinal Engineering, LLC has won 10 small business R&D awards worth $8.3 million through the SBIR and STTR programs since 2017, 5 of them Phase II and 2 STTR. Funded by Navy, Air Force, Army and MDA.
| Awarded | Agency | Project | Amount |
|---|---|---|---|
| May 27, 2025 | Navy | STTR Phase I Medium Voltage Alternating Current System Grounding Circuit | $139,990 |
| Apr 28, 2025 | Air Force | SBIR Phase II SF243-D008 - RETURN (Returning ExoaTmospheric Unique Research is Novel) | $1.8 million |
| Sep 30, 2024 | Navy | SBIR Phase II DIGITAL ENGINEERING - Artificial Intelligence/Machine Learning (AI/ML) Hull Mechanical &… | $1.4 million |
| Jul 25, 2023 | Navy | SBIR Phase I Artificial Intelligence Based Ship Domain Autonomous Controller | $239,923 |
| Sep 30, 2022 | Air Force | SBIR Phase II Energy Needs for Expeditionary Forces Supplied by Rocket Cargo Generated Delivery (ENERGY) | $1.2 million |
| Dec 20, 2021 | Navy | SBIR Phase II ShockIQ: A U.S. Navy Ship Shock Tool | $1.7 million |
| Apr 6, 2020 | MDA | STTR Phase I Dynamic Emulated System In Loop | $99,999 |
| May 31, 2019 | Army | SBIR Phase I Focused Microclimate Heating for Dexterity | $107,975 |
Showing the newest 8. Award data from SBIR.gov. SBIR and STTR awards are grants or contracts for R&D, so some don't appear in its federal contract history.
Registration details
Show registration details
From SAM.gov's monthly public file dated Nov 1, 2026. If the business has updated its registration since, SAM.gov shows the newer details.
| Legal business name | Cardinal Engineering, LLC |
|---|---|
| Unique Entity ID (UEI) | C6KWNDH3EEB5 |
| CAGE code | 5YS97 |
| Location | Washington, DC |
| SAM.gov registration | Active through Jul 9, 2027 |
| Business started | 2010 |
| Primary NAICS code | 541330: Engineering Services |
| Website | www.cardinaleng.com |
| How to contact | Through its website above. No phone or email in SAM.gov's public file. Search UEI C6KWNDH3EEB5 in SBA's Small Business Search for a contact the business added. |
Certifications and business types
No SBA certification (8(a), HUBZone or WOSB) in SAM.gov's public file (Nov 1, 2026).
SBA certifications let a business compete for set-aside contracts (set-asides explained). Check the current record on its SAM.gov entry.
How to check or correct this record
The file sometimes leaves a certification out, and a newer one won't be in it yet.
Check or correct this record at the source: open its SAM.gov entry, or search UEI C6KWNDH3EEB5 () in SAM.gov's entity search (free sign-in) and in SBA's Small Business Search (formerly DSBS), which shows SBA certifications. The business can update its details in its SAM.gov registration and its certifications at certifications.sba.gov.
NAICS codes Cardinal Engineering, LLC is small under
On its SAM.gov registration, Cardinal Engineering, LLC meets the SBA size standard for these industries, so it can bid on small business set-asides that use them.
Open contracts in Cardinal Engineering, LLC's NAICS codes
331 open federal opportunities on SAM.gov use one of Cardinal Engineering, LLC's NAICS codes and may be open to it: no set-aside, or, in the codes it is registered small under, a small business set-aside. Here are a few, those in its primary code first, then those in District of Columbia, then the soonest due.
- SSN(X) Concept Design Expression of Interest
Due in 6 daysEnd of Nov 12, 2026 (12:00 AM Nov 13 EST)
- Intrusion Detection System and Physical Access Control System upgrades
Due in 7 daysNov 13, 2026, 5:00 PM EST
- SAF/SA Campaign Analysis Support
✦ This is a sources sought notice, not a solicitation.
Due in 10 daysNov 16, 2026, 12:00 PM EST
- Core Research Program Technology Transfer & Commercialization Advancement
✦ The Pipeline and Hazardous Materials Safety Administration (PHMSA) Core Research Program is asking for proposals (solicitation 693JK326RA002) to move mature pipeline safety…
Due in 10 daysNov 16, 2026, 5:00 PM EST
- USSS Construction Management & Engineering Services
Due in 14 daysNov 20, 2026, 4:00 PM EST
Similar small businesses
Other small businesses of a similar size with the same primary NAICS code (541330) that have won federal contracts in District of Columbia:
- Marine Design Dynamics Inc, Washington, DC
- BCS LLC, Washington, DC
- Mission-Insights LLC, Washington, DC
- Soil and Land Use Technology, Inc, Washington, DC
- Greystones Consulting Group, LLC, Washington, DC
- Cobec, Inc., Washington, DC
Is this your business? Get a reminder before the SAM.gov registration expires
Get a reminder before the SAM.gov registration expires. It's active through Jul 9, 2027. We'll email you 60, 30 and 7 days ahead, and if it lapses.
Frequently asked questions
What is Cardinal Engineering, LLC's CAGE code?
Cardinal Engineering, LLC's CAGE code is 5YS97. The Defense Logistics Agency assigns CAGE codes when a business registers on SAM.gov.
What is Cardinal Engineering, LLC's UEI?
Cardinal Engineering, LLC's Unique Entity ID (UEI) is C6KWNDH3EEB5. SAM.gov assigns the UEI, and it identifies the business across the federal government.
Is Cardinal Engineering, LLC's SAM.gov registration active?
Yes, as of SAM.gov's public data from Nov 1, 2026, Cardinal Engineering, LLC's registration is active through Jul 9, 2027. Registrations are renewed every year.
Is Cardinal Engineering, LLC a small business?
Cardinal Engineering, LLC is registered on SAM.gov as small under 3 NAICS codes, including its primary code, 541330. Size is set per NAICS code, so a business can be small for some contracts and not others.
Keep going
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- How to become a government subcontractor
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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 report a mistake on this page, or to ask us to remove it, email hello@fedready.us with the page address; we reply within 2 business days. For a removal, write from an address at the company.