Robert Joseph "Bob" Cenker is an American aerospace and electrical engineer, aerospace systems consultant, and former astronaut. In January 1986, Cenker was a crew member on the twenty-fourth mission of NASA's Space Shuttle program, the seventh flight of Space Shuttle Columbia, designated as mission STS-61-C. Cenker served as a Payload Specialist, representing RCA Astro-Electronics, which later became part of Lockheed Martin.