Sempai Matthew X. Dixon Sempai Dixon is a recent addition to the Rockville dojo, having moved here in September, 1998 from the Hombu dojo in Pittsburgh. He is on the Executive Committee and is renowned for his challenging aerobic workouts! He obtained a BA in International Studies and French at Mount Saint Mary's College in 1994, and later earned his Ph.D. in International Political Economy at the Graduate School of Public and International Affairs, University of Pittsburgh, in May 1999. Dixon received his Nidan during the summer of 1998, and now works as the Senior Research Manager on the Corporate Executive Board at the Working Council for Chief Information Officers in Washington, D.C.