Portrait of William H. Gerstenmaier at NASA Headquarters Gerstenmaier directs NASA's human exploration of space.

Official portrait of William H. Gerstenmaier, associate administrator for Space Operations at NASA Headquarters in Washington, D.C. As associate administrator, Gerstenmaier directs NASA’s human exploration of space. He also has programmatic oversight for International Space Station, Space Shuttle, Space Communications and Space Launch Vehicles. (NASA Image Credit: NASA/Bill Ingalls)