System Engineering International, INC.
5115 Pegasus Courtsuite Q, Frederick, MD 21704
Present in a source dataset, with no recent operating signal.
What they make
Telephone Apparatus Manufacturing334210- direct current
- critical power systems
- customer-premises power equipment
- 2U rack
- industrial users
- telephone service providers
- military
- uninterruptible power systems
- ISDN
- DC power products
- 24Vdc
- 48Vdc
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Wgs Systems, LLC | Frederick | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511 | LIKELY ACTIVE | 0.3 KM |
| American Computer Development, Incorporated | Frederick | Printed Circuit Assembly (Electronic Assembly) Manufacturing 334418 | ACTIVE | 0.9 KM |
| Drs Signal Solutions, INC. | Frederick | Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220 | ACTIVE | 1.3 KM |
| System Engineering International INC | Frederick | Other Electronic Component Manufacturing 334419 | ACTIVE | 2.5 KM |
| Marconi Technologies USA LLC | Frederick | Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220 | ACTIVE | 9.3 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
1 source holds this plant, and 5 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.
EPA cross-references this facility in OSHA-OIS.
- EPA Facility Registry ServiceEXISTENCERecord 110070341306 · first seen SEP 2018 · last seen SEP 2018
IN FREDERICK COUNTY7 other plants share this one’s industry (Communications Equipment Manufacturing, NAICS 3342); 3 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
- EPA: SYSTEM ENGINEERING INTERNATIONAL, INC. · OCT 2026
- Street address
- EPA: 5115 PEGASUS COURTSUITE Q · OCT 2026
- City
- EPA: FREDERICK · OCT 2026
- State
- EPA: MD · OCT 2026
- Coordinates
- Census geocoder: 39.370717702349,-77.406007888371 · JUL 2026