Brigadier General Dean R. Ertwine is a native of Ringtown, Pennsylvania, and a 1972 graduate of the U.S. Military Academy.

Brigadier General Ertwine has served with distinction in a variety of positions which include; Executive Officer to the Assistant Secretary of the Army (Research, Development & Acquisition), Pentagon; Commander, Fire Support Armaments Center, United States Army Armament Research, Development and Engineering Center, Picatinny Arsenal; Commander, United States Army Cold Regions Test Center, Fort Greely; Director, Materiel Testing, United States Army Dugway Proving Ground; and as Secretary of the General Staff, deputy G-3 and assistant Division Chemical Officer, 9th Infantry Division (motorized), Fort Lewis.

In October 1999, Brigadier General Ertwine assumed command of the U.S. Army Test and Evaluation Command (later renamed the U.S. Army Developmental Test Command) until his retirement from the U.S. Army in August of 2002.

Brigadier General Ertwine now serves Battelle as Vice President for Army Science and Technology Business Development. He's charged with using his many years of Army R&D experience to develop new business opportunities for Battelle's Defense Systems group.