Exploration happens when new technologies meet new commercial applications. We are here to catalyze the infrastructure expansion in space and permanently keep humanity exploring the cosmos.

Our electrodeless RF plasma thrusters are easily manufacturable and can use novel advanced propellants, paving the way for the next generation of small satellites produced in large volumes.

Our Values

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We’re always learning.

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We trust and grow with each other.

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We care about transparency.

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Flexibility. Food. Fun.

We trust you to balance your responsibilities in and outside of work. We offer generous time off and a range of settings to help you be your best.

Unlimited snacks and coffee. Friday team lunches. BBQs on our sunny patio. We’re within walking distance of vibrant downtown El Segundo.

Monthly outings like Dodgers games, rocket launches, and beach time. Game nights, surf sessions, basketball Wednesdays, and tennis Thursdays.


Be an owner. Hop on our rocketship.


Don’t sacrifice salary for mission.


Matching 401K, medical, dental, vision, life, and disability.


We foster and support your curiosity and growth.

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"I decided to join Phase Four full time as a Fluid Systems Engineer two months into my internship because within those two months, I felt as if I've gained a full year's worth of experience. As a fresh college grad, it seemed unimaginable to me that I was able to take ownership of my own projects and make my own design choices as an intern. My time at Phase Four had an actual impact on the product, and I feel like a valued member of the team. It's an amazing feeling to be able to come into work and have a new challenge to tackle every day. I'm very glad to be able to work on cutting-edge tech with an awesome team!"

Eugene Chang, Fluid Systems Engineer

To conform to U.S. Government space technology export regulations, applicant must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.


Don’t see a role that fits you? We’re always looking for talented individuals to join our team. Send your resume to, and tell us what you’re interested in working on. We’ll consider you for the future!