NACA Engineer
Engineer, Aerodynamics, Research Division (Mercury Program)
Chief, Flight Dynamics Branch/ Flight Director, Mission Control (Gemini and Apollo Program)
Manager for the Apollo-Soyuz Test Project/ Apollo Spacecraft Program (ASTP and Skylab Programs)
Manager, Shuttle Payload Integration and Development Program
Deputy Associate Administrator for Space Flight/ Acting Associate Administrator for Space Transportation Operations, NASA Headquarters (Space Shuttle Program)
Manager, National Space Transportation Systems Program
