Parsons joined the NASA team in 1990 at the Kennedy Space Center as a launch site support manager in the Shuttle Operations Directorate.

In 1997, he was assigned to Stennis Space Center as the chief of operations of the Propulsion Test Directorate.

[1] He was appointed as Space Shuttle Program manager in 2003 to lead the return-to-flight activities for the agency and played a major role in the success of the Discovery STS-114 mission.

[1] After leaving NASA, Parson would be hired as the Vice-President of Peraton's Human Space Programs.

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