Long-time manager and scientist at NASA’s Jet Propulsion Laboratory; three-time NASA astronaut candidate finalist; Manager of JPL’s Project Planning Office, 2006-2013; Manager of JPL’s Exploration Systems Autonomy research section, 1999-2005; Mission Director & Operations Manager of the Cassini-Huygens mission to Saturn, 1993-1998; Deputy Mission Director & Flight Engineering Office Manager for the Magellan mission to Venus, 1989-93; Space Shuttle Flight Controller, NASA Johnson Space Center, 1984-87.