Greg is a Vietnam veteran who spent 14 years in the US Navy, advancing in rank throughout his time. He served as a consultant to top executives of Fortune 1000 businesses after leaving the Navy in 1984, especially in the nuclear power sector. Having recently retired and had been residing in Amarillo, Texas, with his wife, Greg wanted to do something different. Sagan has never been a member of a political party before. But in 2018, he ran for the United States House of Representatives.