William Charles Schneider was an American aerospace engineer. He served in the United States Naval Reserve 1942–1946 as an Aviation Machinist's Mate, 1st Class Petty Officer. He joined NASA in June 1963 and served as the Gemini mission director for seven of the ten piloted Gemini missions. From 1967 to 1968, he served as Apollo mission director and the Apollo program's deputy director for missions. He then served from 1968 to 1974 as the Skylab program's director. From 1974 to 1978, he worked as the Deputy Associate Administrator for Space Transportation Systems. From 1978 to 1980, he served as the Associate Administrator for Space Tracking and Data systems. He received a Ph.D. in engineering from Catholic University of America.

The NASA Distinguished Service Medal is the highest award that can be bestowed by the National Aeronautics and Space Administration of the United States. The medal may be presented to any member of the federal government, including both military astronauts and civilian employees.