John Glenn did not work for NASA in the traditional sense of being an employee. However, he was deeply involved with the organization throughout his life:

* He was an astronaut for NASA: Glenn was one of the original seven astronauts selected for Project Mercury. He flew the Friendship 7 mission, becoming the first American to orbit Earth.

* He was a senator: After his astronaut career, Glenn served in the United States Senate. He was a strong advocate for NASA and space exploration.

* He was a consultant: Glenn continued to work with NASA after his Senate service. He provided advice on space policy and technology.

While he didn't have a formal job at NASA after Project Mercury, his relationship with the agency remained strong and influential for decades.