Selected as an astronaut in June 1998, Melvin reported for training in August 1998. He has since been assigned to the Astronaut Office Space Station Operations Branch, and the Education Department at NASA Headquarters, Washington, D. C. As co-manager of NASA’s Educator Astronaut Program, Melvin has traveled across the country, discussing space exploration with teachers and students, and promoting science, technology, engineering and mathematics. He next served in the Robotics Branch of the Astronaut Office. In October 2010, Melvin was named as associate administrator for the Office of Education. As associate administrator, Melvin was responsible for the development and implementation of NASA’s education programs that inspire interest in science and technology and raise public awareness about NASA goals and missions. He retired from NASA in February 2014.