2003-Present Professor, Department of Psychiatry, Wayne State University - School of Medicine
Vice President Medical Affairs/CEO Medical Group Search, 1999
Chief of Pulmonary Medicine Search, 1999
Chair, Biostatistics Search, 1999
Executive Research Directors, Wayne State University, Detroit, MI 1996-2003
1995-2003 Director of Research, Henry Ford Health Sciences Center
1995-2003 Adjunct Professor, Department of Psychiatry, Wayne State University - School of Medicine, Detroit, Michigan
1979-Present Clinical Professor, Department of Psychiatry, University of Michigan School of Medicine
1978-Present Director, Sleep Disorders and Research Center, Henry Ford Health Systems
1978-2003 Division Head, Henry Ford Hospital Sleep Disorders and Research Center, Department of Psychiatry, Detroit, Michigan
1977-1978 Co-Director, Sleep Disorders Center, Cincinnati General Hospital, Cincinnati, Ohio
1976-1978 Associate Professor of Psychology, Department of Psychiatry, College of Medicine, University of Cincinnati, Cincinnati, Ohio
1976-1978 Adjunct Associate Professor of Psychology, Department of Psychology, University of Cincinnati, Cincinnati, Ohio
1976-1978 Associate Professor of Psychology, Department of Psychology, Xavier University, Cincinnati, Ohio
1972-1978 Co-Director, Sleep Research Laboratory, Veterans Administration Hospital, Cincinnati, Ohio
1972-1976 Assistant Professor of Psychology, Department of Psychiatry College of Medicine, University of Cincinnati, Cincinnati, Ohio
1970-1972 Research Associate, Department of Psychiatry, College of Medicine, University of Cincinnati, Cincinnati, Ohio
1969-1970 Research Assistant, Sleep and Dream Laboratory, Department of Psychiatry, Veterans Administration Hospital
1967-1969 Teaching Assistant, Experimental Psychology, University of Cincinnati, Cincinnati, Ohio
1967-1968 Research Associate, Department of Community Planning, University of Cincinnati
1965-1967 Research Assistant, Department of Pharmacology, College of Medicine, Howard University
1965.1967 Teaching Assistant, Introductory and Experimental Psychology, Howard University