[2] Ellis started college at the University of Southern California, where he planned to graduate and be a screenwriter, and study as part of USC’s Thematic Option program.
[2] Ellis and Relativity's other co-founder and CTO, Jordan Noone, both held leadership positions at USC's Rocket Propulsion Lab (RPL).
[5] After graduation, Ellis joined Blue Origin full time where he worked on 3D printed rocket components[6] and served as a propulsion development engineer on crew capsule RCS thrusters, BE-4, and New Glenn.
[5] In 2015, Ellis co-founded Relativity Space with his former classmate, Jordan Noone,[7] with the mission of being the first company to launch a fully 3D printed rocket into orbit.
[9] In April 2018, Cuban told the Los Angeles Times over email that he invested in Relativity because, "They are smart, innovative, focused and always learning.