Operating signal within 12 months from two or more independent sources.
What they make
Ship Building and Repairing336611- ship repair
- systems installation
- testing
- professional services
- Quality Management
- NAVSEA
- VSRA
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Epsilon Systems Solutions INC | Portsmouth | Ship Building and Repairing 336611 | ACTIVE | 0.3 KM |
| Epsilon Systems Solutions | Portsmouth | Ship Building and Repairing 336611 | UNVERIFIED | 0.3 KM |
| Fairlead Integrated, LLC | Portsmouth | Ship Building and Repairing 336611 | ACTIVE | 0.3 KM |
| US Navy Mid-atlantic Regional Maintenance Center (marmc) at Nassco Earl | Portsmouth | Ship Building and Repairing 336611 | LIKELY ACTIVE | 0.6 KM |
| General Dynamics Nassco-norfolk - Harper Facility | Portsmouth | Ship Building and Repairing 336611 | LIKELY ACTIVE | 0.6 KM |
Also at this address
1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.
Where this record comes from
2 sources hold this plant, and 8 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
- The company’s own websiteOPERATINGfirst seen JUL 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord DWBFTJCK32F8 · first seen DEC 2025 · last seen DEC 2025
IN PORTSMOUTH COUNTY49 other plants share this one’s industry (Ship and Boat Building, NAICS 3366); 6 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- SAM.gov: POSEIDON INDUSTRIAL LLC · DEC 2025
- Street address
- SAM.gov: 660 MT VERNON AVE · DEC 2025
- City
- SAM.gov: PORTSMOUTH · DEC 2025
- State
- SAM.gov: VA · DEC 2025
- Coordinates
- Census geocoder: 36.843600124596,-76.336368623703 · JUL 2026
- Website
- SAM.gov: Poseidon-Industrial.com · DEC 2025
- CAGE code
- SAM.gov: 8MWA2 · DEC 2025
- SAM registration expires
- SAM.gov: 2026-12-10 · DEC 2025