General Dubik has extensive operational experience in Iraq, Afghanistan, Japan, Korea, Thailand, Bosnia, Haiti, Panama, Honduras, and in many NATO countries.

His last job on active duty was as commanding general of the Multinational Security Transition Command-Iraq (MNSTC-I) and the NATO Training Mission-Iraq in 2007–2008.

General Dubik taught philosophy at West Point and campaign theory and practice at the U.S. Army School of Advanced Military Studies, Fort Leavenworth, Kansas.

He has completed an MIT fellowship program for national security studies as well as executive programs in national security at Harvard's JFK School of Government and Syracuse University's Maxwell School of Citizenship and Public Affairs.

After retiring from active duty, he completed a Ph.D. degree in philosophy at Johns Hopkins University[6][7] in August 2014.