- 2015/04 - 現在 Professor, Graduate School of Humanities and Social Sciences
- 2009/04 - 埼玉大学教養学部教授
- 2009/04 - Professor of History, Faculty of Liberal Arts, Saitama University
- 2005/04 - 2009/03 早稲田大学国際教養学部非常勤講師
- 2005/04 - 2009/03 埼玉大学教養学部助教授・准教授
- 2005/04 - 2009/03 Adjunct Professor of History, School of International Liberal Arts, Waseda University
- 2005/04 - 2009/03 Associate Professor of History, Faculty of Liberal Arts, Saitama University
- 2002/05 - 2005/04 テンプル大学ジャパン非常勤講師
- 2002/05 - 2005/04 Adjunct Professor of History, Temple University Japan
- 2003/10 - 2005/03 埼玉大学教養学部外国人教師
- 2003/10 - 2005/03 Foreign Lecturer, Faculty of Liberal Arts, Saitama University
- 1996/09 - 1999/05 南カリフォルニア大学歴史学部教職助手
- 1996/09 - 1999/05 Teaching Assistant, Department of History, University of Southern California
- 1992/09 - 1993/05 ノース・カロライナ大学歴史学部研究助手
- 1992/09 - 1993/05 Research Assistant, Department of History, University of North Carolina at Greensboro