History of Academic Appointments

• 9/94-Present: Professor, Loyola University Chicago
• 9/89-9/94: Associate Professor, Loyola University Chicago
• 9/87-9/89: Assistant Professor, Loyola University Chicago
• 9/85-5/87: Kenna Assistant Professor, University of Notre Dame
• 9/82-8/85: Assistant Professor, University of Washington (Seattle)

History of Visiting Appointments

• 1/13–5/13: Ulam Professor, Univesity of Colorado, Boulder
• 1/09–7/09: Mercator Professor, Bielefeld University
  
• 2/08-4/08: Member, Mathematical Sciences Research Institute, (Berkeley, California)
• 1/93-6/93: Visiting Associate Professor, University of Washington (Seattle)
• 9/90-12/90: Member, Mathematical Sciences Research Institute, (Berkeley, California)

Fellowships and Research Visits

• Osaka City University, 10-24 May 2008
  
• Yip Fellow, Magdalene College, Cambridge University, 1 May - 15 July 2007
• Beijing Institute of Technology, 11 June - 9 July 2006
• Cambridge University, 19 May - 30 June 2004
• Cambridge University, June 2003
• Lancaster University, May 2003
• University of Stuttgart, April 2003
• Oxford University, EPSRC Research Fellow, 15 November 2002 - 31 March 2003
• University of Leicester, EPSRC Research Fellow, 15 October - 14 November, 2002
• University of Stuttgart, 15 September - 14 October, 2002
• Mathematisches Forschungsinstitut Oberwolfach, Research-In-Pairs: 25 August - 14 September, 2002
• University of Kassel, 21-27 November, 1999
• University of Bielefeld, 9-21 August, 1999
• Aarhus University, 27 July - 17 August, 1998
• Queen Mary College, University of London, SERC Research Fellow, June 1991
• Aarhus University, Denmark, July 1990
• Tata Institute of Fundamental Research, (Bombay, India), December 1989
• University of Manchester, SERC Research Fellow, 13 July - 26 August, 1988