Gertenmaier was reassigned as a special assistant to Bridenstine's deputy, Jim Morhard.
NASA Administrator Jim Bridenstine informed agency employees in a memo Wednesday night that NASA veteran Bill Gerstenmaier would no longer be leading the Human Exploration and Operations Mission Directorate.
"I sometimes think the three of us missed "the big event".
Both Armstrong and Aldrin then reportedly spent over 21 hours on the Moon's surface during which they collected the surface samples, took photographs, and performed some experiments.
Officials also told the newspaper that there was tension between Bridenstine and Gerstenmaier. The move signifies something of a demotion for Gerstenmaier at the agency.
Gerstenmaier began his career with NASA in 1977 doing aeronautical research.
Also on sale are a pair of mission control panels used on space missions.
The high-profile executive changes at NASA came at a time when the space agency is working on the new moonshot program named Artemis.
Several lawmakers, including Rep. Eddie Bernice Johnson (D-TX), who chairs the House Science, Space and Technology; and Rep. Kendra Horn (D-OK), chair of the House subcommittee on space and aeronautics; criticized the decision to reassign Gerstenmaier.
Gerstenmaier appeared to favor test firing the mammoth rocket's first stage, powered by four upgraded space shuttle main engines, at NASA's Stennis Space Center in MS next year to make sure the booster met its design specifications.
The new timeline gives NASA only five years to acquire the hardware and funds it needs.
To meet the administration's goal, NASA is relying on the huge Boeing-built SLS rocket that will be even more powerful than the legendary Saturn 5 boosters that propelled the Apollo astronauts to the moon. After completing the exploration of the Moon, the two astronauts went back to the command and service module.
The Artemis mission could send people to the lunar surface for the first time in half a century.