Robert Thomas "Bob" Hines Jr. (born January 11, 1975) is an American fighter pilot and NASA astronaut.

He attended Specialized Undergraduate Pilot Training (SUPT) at Columbus Air Force Base and graduated in 2000 as part of class 01–03.

He then trained to be an F-15E Strike Eagle pilot at Seymour Johnson Air Force Base, before an assignment at RAF Lakenheath.

[4] Prior to his selection as an astronaut, Hines served as a test pilot at NASA's Johnson Space Center, as well as for the Federal Aviation Administration.

[2][5] In February 2021, Hines was assigned as pilot of SpaceX Crew-4, alongside NASA astronaut Kjell N. Lindgren who is the commander.

[2] Hines holds a Technician class Ham Radio operators license with call sign KI5RQT.