# Phase Four

Phase Four is a provider of electric propulsion (EP) for small satellites.

The company was founded in 2015 to accelerate the advancement of its core differentiator, the Radio Frequency Thruster (RFT). The hallmark of Phase Four’s RFT is simplicity.

**Headquarters:** El Segundo, California, United States
**Founded:** 2015
**Employees:** ~31
**Founder:** J. P. Sheehan, Simon Halpern
**Website:** http://www.phasefour.io/
**Focus areas:** Aerospace, Innovation Management, Space Travel
**Open positions:** 0

[View all jobs at Phase Four](https://zerogtalent.com/space-companies/phase-four)

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*Source: [Zero G Talent](https://zerogtalent.com), the job board for space, defense, AI, robotics and frontier-tech companies.*