Gene Simmons is an American geophysical and geological researcher. He has been Vice President of Hager-Richter Geoscience Inc. since 1989 when he took early retirement from the Massachusetts Institute of Technology, where he had been a Professor of Geophysics, and is currently Professor Emeritus. In his long and distinguished career, he has published extensively in many topics of geology, geophysics, and rock physics.
He was Chief Scientist at NASA's Manned Spacecraft Center (now the Johnson Space Center) in Houston during the Apollo missions to the Moon.
Gene Simmons received his BS degree in electrical engineering in 1949 from Texas A&M College, and his MS degree in Geology (with minor in physics) from Southern Methodist University in 1958, and his PhD in 1962 from Harvard. He served as a post-doctoral researcher at Harvard, working with Francis Birch. 
Dr. Simmons joined the faculty of the Massachusetts Institute of Technology in September of 1965. In October 1969, after only 4 years at MIT, Simmons was named Chief Scientist of NASA Manned Space Center (now the Johnson Space Center) in Houston, Texas. While at NASA, and after his appointment ended he was a great supporter and communicator of science to the public. His NASA publications On the Moon with Apollo 15 , On the Moon with Apollo 16, and On the Moon with Apollo 17 (the last published after Dr. Simmons left NASA at the end of 1972.) guide books to these respective missions.
Gene Simmons took early retirement in 1989 and has been Vice President of Hager-Richter Geoscience Inc. since that time.
- Hager-Richter Inc. 
- Shrock, R. R. (1982) A history of the first hundred years of geology at the Massachusetts Institute of Geology 1865-1965, MIT Press, p.742.
- Simmons, G. (1971) On the Moon with Apollo 15  NASA.
- Simmons, G. (1972) On the Moon with Apollo 16 NASA
- Simmons, G. (1972) On the Moon with Apollo 17 NASA.