Based in Hawthorne, California, Phase Four is enabling the exponential growth of satellite constellations by solving the satellite’s costliest problem, the propulsion system. By eliminating the most common failure points in legacy technologies – electrodes, high-voltage electronics, and complex fabrication – Phase Four has built a system that offers reliable high performance with baked-in manufacturability. Our systems provide Hall Effect Thruster performance at a fraction of the price and delivery timeline, with nearly double the lifespan. Check out our open positions at at www.phasefour.io/careers if you have interest in joining our mission.
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Phase Four Questions
The Phase Four annual revenue was $43.7 million in 2026.
Eric Huey is the Director of Engineering of Phase Four.
12 people are employed at Phase Four.
Phase Four is based in Hawthorne, California.
The NAICS codes for Phase Four are [332, 541, 3325, 54, 33251, 33].
The SIC codes for Phase Four are [73, 737].
Top Phase Four Employees
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Eric Huey
Director of Engineering at Phase Four
United States12 -
Merla Villegas
Financial Controller at Phase Four
Cerritos, California, United States12 -
Parth Patel
Director of Production Operations at Phase Four
Hawthorne, CA, US -
Andrew Thornborough
Software Engineer at Phase Four
Los Angeles, CA, US13 -
Hannah Chang
Mechanical Engineer at Phase Four
Seattle, WA, US12 -
Hamza Malik
Mechanical Engineer at Phase Four
Inglewood, CA, US1 -
Fanny Liao
Operations Manager at Phase Four
Los Angeles, CA, US1 -
Eric Huey
Director of Engineering at Phase Four
United States22 -
George Peraza
Procurement Associate at Phase Four
United States11 -
Caleb Sybrant
Waste Management Specialist at Phase Four
Hinckley, MN, US
