Mission Specialist — classified United States Department of Defense payload STS-49 Endeavour — May 1992 — Mission Specialist — Maiden flight of Endeavour, Intelsat 603 capture and redeployment to a correct orbit, first and only (as of 2019) EVA involving three astronauts STS-62 Columbia — March 1994 — Mission Specialist — operation of the U.S. Microgravity Payload-2 (USMP-2) References NASA Astronaut Corps Lists of astronauts