sentences:  He worked on a number of other projects, including the first servicing mission for the Hubble Space Telescope.He later served as the chairperson of the Genesis spacecraft mishap investigation board, and discovered a test that Lockheed Martin had skipped that would have prevented the mishap.Ryschkewitsch was eventually promoted to Deputy Director of Goddard Space Flight Center in 2005, and then to Chief Engineer of NASA in 2007.