John Weidner is a Major General in the United States Army, serving as the Chief of Staff for the United Nations Command and United States Forces Korea. He oversees the enforcement of the Armistice Agreement and facilitates diplomacy in Northeast Asia. Weidner holds a Bachelor of Science degree in physics from St. John's University and a Ph.D. in medical physics from the University of Wisconsin-Madison. His military education includes the Engineer Officer Basic and Advanced Courses, the Command and General Staff College, and the Army War College.