--Langley Research Center
Technical Management, Viking Project, GAS Chromatograph Mass Spectrometer.
--NASA Headquarters
Program Manager, International Solar-Polar Mission (now Ulysses Mission)
Manager, Galileo Program
Manager, Planetary Advanced Programs
Deputy Director, Solar System Exploration Division
Director, Strategic Plan and Programs for Space Station
Assistant Associate Administrator,
Deputy Associate Administrator, Office of Space Science and Applications (OSSA),
Deputy Associate Administrator, Space Science
Chief Engineer
--Goddard Space Flight Center
Deputy Director
Center Director
--NASA Headquarters
Associate Administrator of Science
