After graduate work in planetary physics at M.I.T., Marshall Eubanks was the technical lead of Very Long Baseline Interferometry (VLBI) programs at both the Jet Propulsion Laboratory and the U.S. Naval Observatory, creating measurement systems essential for navigation of spacecraft and the operation of the Global Positioning System satellites. In 2018, he co-founded Space Initiatives Inc and is currently Chief Scientist there, where he has been working on low cost communication, positioning and instrumental arrays on the Moon as part of the Air Force "Lawn Dart" program. He has also been working, as part of a Breakthrough Starshot Grant and the Institute for Interstellar Studies - US, on possible missions to Interstellar Objects in the solar system, and is active in various Science Working Groups to develop a proposal for the Next Generation Event Horizon Telescope.