Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites SIERRA LOBO INC Aerospace engineering, manufacturing, and test services for NASA, DoD, and other government programs 
| Phase Four | SIERRA LOBO INC | |
|---|---|---|
| Founded | 2015 | 1993 |
| Headquarters | Hawthorne, California | Fremont, Ohio |
| Type | private | private |
| Status | closed | operating |
| Employees | 5 | — |
| Total funding | $35.8M | $1.58B |
| Latest round | Series C | Series E |
| Sectors | Space Propulsion, Satellite Components & Subsystems | Satellite Manufacturing, Space Defense Systems, Space Propulsion |
| Products listed | 4 | 47 |
| Federal contracts | — | 1 ($251.0M) |
| Launches | — | — |
| Leaders listed | Steve Kiser, M. Umair Siddiqui, Simon Halpern | — |
| News mentions | 0 | 10 |
How do Phase Four and SIERRA LOBO INC compare?
Both companies work in Space Propulsion. Phase Four was founded in 2015 and SIERRA LOBO INC in 1993.
Which has more US federal contracts, Phase Four or SIERRA LOBO INC?
SIERRA LOBO INC has been awarded more, with $251.0M across 1 awards.