In June 1987, Campbell was reassigned to Armor Branch, U.S. Army Military Personnel Center in Alexandria, Virginia, later renamed U.S. Army Personnel Command, where he served as the captains' and later the majors' Assignment Officer of the Armor Branch, Combat Arms Division.

After he was selected for battalion command, Campbell served as the G3 (Operations) Assistant Training Officer for I Corps at Fort Lewis, Washington.

In January 1996, he assumed command of 1st Battalion, 33rd Armor Regiment, a part of 3rd Brigade, 2nd Infantry Division at Fort Lewis.

His following assignment was as the deputy director of Staff Operations for the Supreme Headquarters Allied Powers Europe in Mons, Belgium.

He held this position until November 2012 when he relinquished command to go take charge of United States Army Europe, newly headquartered in Wiesbaden, Germany.