sentences:  He is on the editorial board of the journal "Past & Present"; the academic advisory board of the Institute for European History, Mainz; and the advisory board of the Friends of the German Historical Institute, Washington.He was chair of the Harvard History Department from 1998–1999 and again from 2000–2002, and was president of the Conference Group on Central European History of the American Historical Association (since 2012 called Central European History Society) in 2003–2004.Since 2016, he has served as a trustee of the National Humanities Center in Research Triangle Park, NC.