John did five combat tours of duty; Operation Just Cause in Panama, Operation Desert Shield/Storm, two tours in Operation Iraqi Freedom, and Operation Enduring Freedom in Afghanistan. He went on to serve as the Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff, and the senior noncommissioned officer in the U.S. Armed Forces, from Dec. 11, 2015, until his retirement on Dec. 13, 2019. John is married to Sandra, his wife of 32 years. They have three adult sons and two grandchildren.