Pedzisa mutsara unotevera: Gregory akabatana neAir Force muna 1977. Akapiwa 47th Flying Training Wing, 3rd Tactical Fighter Wing, uye Pacific Air Forces asati apinda Air Command uye Staff College uye Industrial College of Armed Forces. Gare gare akashanda somubatsiri wemauto kuna United States Secretary of Defense munguva ye
Kutanga Kutonga Kwomutungamiriri Wenyika muna 1993. Mushure mekupedza kudzidza kubva kuIndustrial College yeArmed Forces muna 1994, akapiwa basa neJoint Chiefs of Staff uye akava Mutungamiriri weFinancial Analysis Division yeBudget yePacific Air Forces muna 1996. Muna 1999, akagadzwa Director of Financial Management uye Comptroller of Air Force Space Command asati apiwa kuHofisi yeMutevedzeri Wemunyori weAir Force weMari Management uye Comptroller. Kubvira musi waSeptember 1, 2006, akanga ava pamudyandigere.