Dark Fission Space Systems, INC.
18 Liberty St Sw Unit 200, Leesburg, VA 20175
Operating signal within 12 months from two or more independent sources.
What they make
Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing336415Dark Fission manufactures the DARKFORCE nuclear thermal rocket engine, which uses a radial-inflow particle bed reactor architecture and expels heated hydrogen as propellant. The company serves space missions requiring cislunar logistics and rapid solar system access. The development is funded by the U.S. Space Force under a SpaceWERX Direct-to-Phase-II SBIR award.
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Amphibian Aerospace Industries Defense, INC | Leesburg | Aircraft Manufacturing 336411 | ACTIVE | 0.4 KM |
| Electronic Instrumentation & Technology LLC | Leesburg | Printed Circuit Assembly (Electronic Assembly) Manufacturing 334418 | ACTIVE | 3.1 KM |
| Flying Ship Technologies CORP | Leesburg | Boat Building 336612 | ACTIVE | 3.9 KM |
| Periscope Aviation LLC | Leesburg | Aircraft Manufacturing 336411 | LIKELY ACTIVE | 4.6 KM |
| Tran, Thuy | Leesburg | Other Engine Equipment Manufacturing 333618 | LIKELY ACTIVE | 5.0 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 2 FEDERAL SOURCES, 8 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| SAM GOV | OPERATING | MAY 2026 | MAY 2026 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | SAM GOV | MAY 2026 |
| CAGE CODE | SAM GOV | MAY 2026 |
| CITY | SAM GOV | MAY 2026 |
| GEOM | CENSUS GEOCODER | JUL 2026 |
| NAME | SAM GOV | MAY 2026 |
| REGISTRATION EXPIRATION | SAM GOV | MAY 2026 |
| STATE | SAM GOV | MAY 2026 |
| WEBSITE | SAM GOV | MAY 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.


