[3] Born in Delaware and raised in South Carolina,[1][2] Wharton graduated from the United States Military Academy in West Point, New York in 1981.

He also holds a Master of Science degree in national security and strategic studies from the Naval War College.

[3] After graduating from the United States Military Academy in 1981, Wharton's first assignment was at Fort Hood, Texas, where he served as main supply platoon leader and company commander, 15th Supply and Transport Battalion, 1st Cavalry Division.

In 1985, he transferred to the Dragon Brigade, XVIII Airborne Corps, Fort Bragg, North Carolina, and later deployed to Sinai, Egypt, with Task Force 3-502nd Infantry, 101st Airborne Division (Air Assault) as part of the Multinational Force and Observers.

In 1986, Wharton assumed duties as an inspector general to the U.S. Army Western Command at Fort Shafter, Hawaii.