Jeffrey Hayes is currently on detail to the Space Communication and Navigation (SCaN) organization from the Science Mission Directorate (SMD). In SMD he is a discipline scientist in the Heliophysics and Astrophysics Divisions at NASA HQ. His duties include the support of the missions currently in operation (Mission Operations and Data Analysis; MO & DA), as well as their data holdings, and provide guidance for those missions that are in their definition or the early development phases. He is also the Program Executive for the all operation NASA heliophysics missions (over 20 at the present time).

Prior to joining NASA, Jeffrey was a senior scientist working on the National Polar-orbiting Operational Environmental Satellite System (NPOESS) satellite project on the Ozone Mapping and Profile Suite (OMPS) instrument at Raytheon. He has been a member of a six-person team of on-site resident astronomers, responsible for overseeing the acquisition of data obtained for the Sloan Digital Sky Survey in Sunspot, NM. 

Jeffrey has held a number of positions at the Space Telescope Science Institute, which runs Hubble Space Telescope (HST), as an instrument scientist on both the Faint Object Spectrograph (FOS) and Space Telescope Imaging Spectrograph (STIS) instruments, as well as working on digitizing the entire night sky for internet access as part of the Guide Star Catalogue group. 

Jeffrey has been faculty on at a number of universities: Loyola in Maryland, Rutgers in New Jersey, Carleton in Ottawa, Canada, and others. His observing runs while a practicing astronomer include Kitt Peak National Observatory, the Jansky Very Large Array (VLA), Lowell Observatory, Mont Megantic, and Apache Point. 

Jeffrey was a post-doctoral fellow at the Universite de Montreal, and Rutgers University, as well as a visiting scientist at Fermilab. 

He studied for his doctorate at the University of Maine, his Master of Science in astronomy at Saint Mary’s University in Halifax, Canada, and his Bachelor of Science in physics at Carleton University in Ottawa, Canada. He is a member of the American Astronomical Society, and a Fellow of the Royal Astronomical Society.