Melvin flew as a mission specialist on the STS-122 mission in 2008. He was born in Lynchburg, Va. Melvin earned a bachelor’s degree in chemistry from the University of Richmond and a master’s degree in materials science engineering from the University of Virginia. He was selected as an astronaut in 1998.
For more on Melvin, here’s a link to his official NASA bio. Fun fact: Melvin was drafted in the 11th round of the NFL Draft by the Detroit Lions in 1986.