Holly Elizabeth Ridings (born 25 December 1973) is an American mechanical engineer and was the first woman to be chief flight director at NASA.

[5] Ridings joined NASA in 1998, working as an International Space Station flight controller in the Thermal Operations and Resources Group.

[1] As expedition 16 lead, Ridings was responsible for the crew of the International Space Station for STS-120, STS-122, STS-123 as well as the first Automated Transfer Vehicle mission.

[6] During STS-127, Ridings oversaw major construction to the International Space Station, including the addition of the Japanese Exposed Facility and the External Platform.

Ridings won the NASA Outstanding Leadership Medal for Expedition 16 and the SpaceX Dragon Mission.