· Professor of Computational Mathematics, University of British Columbia2014–
· Professor, University of California, Davis2014–2016
· Vice President for Health Sciences and Technology, Virginia Tech2010–
· Executive Director, Virginia Tech Carilion School of Medicine and Research Institute2010–
· Professor and Chairman, Department of Neuroscience, Baylor College of Medicine2005–2010
· Evelyn F. McKnight Professor of Learning and Memory in Aging, University of Alabama at Birmingham (UAB)2004–2005
· Assistant Professor to Associate Professor, University of British Columbia2004–2014
· Wilkinson Fellow, Argonne National Laboratory2002–2004
· Founding Director of the Neurobiology Research Center, Founding Chair of the Department of Neurobiology, Director of the Civitan International Research Center, University of Alabama at Birmingham (UAB)1996–2005
· Ph.D. in Physiology and Biophysics, University of Illinois Urbana-Champaign1972–1978
· Bachelor's Degree in Biology, Florida State University
· Postdoctoral Fellowship, University of Virginia