1993-09 to 1997-12 Postdoctoral Fellow (Laboratory of Eric Kandel), Columbia University College of Physicians and Surgeons
1998-01 to 2016-12-31 Assistant Professor, Associate Professor, Professor (Biology), University of Pennsylvania
2004-2008 Associate Professor with Tenure, Department of Biology, University of Pennsylvania
2006-2016 Program Director, NIMH Training Program in Behavioral and Cognitive Neuroscience, University of Pennsylvania
2006-2016 Director, Biological Basis of Behavior Program, University of Pennsylvania
2008-2016 Professor, Department of Biology, University of Pennsylvania
2009-2010 Edmund J. and Louise W. Kahn Term Professor of Biology, University of Pennsylvania
2010-2016 Professor, Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania (Secondary Appointment)
2010-2016 Brush Family Professor of Biology, University of Pennsylvania
2011 Gastwissenschaftler, Molekulare Organisation des Gehirns, Institut für Neurowissenschaften und Medizin (IMN-2), Forschungszentrum Jülich, Germany
2012-2016 Founding Director, Neurobehavior Testing Core, University of Pennsylvania
2017-01-01 to present Director, Iowa Neuroscience Institute, University of Iowa
2017-01-01 to present Chair, Department of Neuroscience & Pharmacology (Neuroscience & Pharmacology), The University of Iowa
2017-present Professor, Department of Psychiatry, Carver College of Medicine, University of Iowa (Secondary Appointment)
2017-present Professor, Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa
2017-present Professor, Department of Biochemistry, Carver College of Medicine, University of Iowa (Secondary Appointment)
2017-present Professor, Department of Psychological and Brain Sciences, University of Iowa (Secondary Appointment)
2019-present Chair and Departmental Executive Officer, Department of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa
2019-present Professor, Department of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa
2019-present Professor, Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa (Secondary Appointment)