1979-1980 Assistant Professor, Department of Neurology, Louisiana State

    University, Shreveport, LA

    1980-1985 Assistant Professor Department of Neurology, University of

    Kentucky College of Medicine, Lexington, KY

    1983-1985 Assistant Professor, Graduate Center for Toxicology, University of

    Kentucky College of Medicine, Lexington, KY

    1985-1992 Associate Professor, Department of Neurology College of Medicine,

    University of Kentucky, Lexington, KY

    1985-1992 Associate Professor, Graduate Center for Toxicology, University of

    Kentucky College of Medicine, Lexington, KY

    1991-1992 Associate Professor, Nutritional Sciences, University of Kentucky

    College of Medicine, Lexington, KY

    1991-present Associate, Sanders-Brown Center on Aging, University of

    Kentucky College of Medicine, Lexington, KY

    1991-present Chief, Neurology Service, Veterans Affairs Medical Center,

    Lexington KY

    1992-present Professor, Department of Neurology, University of Kentucky

    College of Medicine, Lexington KY

    1992-present Professor, Graduate Center for Toxicology and Nutritional

    Sciences, University of Kentucky, Lexington KY

    Director: Motor-Neuron Disease - ALS Clinic