Marc G. Millis is best known for leading NASA’s Breakthrough Propulsion Physics project (1996-2002) and for the 2009 book, Frontiers of Propulsion Science  - examining the physics of non-propellant space drives and faster-than-light flight. In 2010 Millis took an early retirement from his 31 years at NASA to continue these edgy pursuits via the nonprofit Tau Zero Foundation. His expertise spans physics, electronic engineering, cryogenic propellants, and electric space propulsion.

He gives short courses at universities and public lectures. He attended the International Space University’s Summer Session and earned a BS in Physics from Georgia Tech, and MS in Physics Entrepreneurship from Case Western Reserve University.