NASA astronaut Mike Fincke is leaving the agency after 30 years of service, which included four spaceflights and 549 days in space. He completed nine spacewalks in support of the International Space Station during his career. Fincke's contributions have significantly shaped NASA's history.

Source: https://www.nasa.gov/news-release/nasa-astronaut-mike-fincke-leaves-nasa-career-includes-4-spaceflights/