Professor of the Practice - June 2020 - present
School of Chemistry and Biochemistry
Georgia Institute of Technology
Atlanta, Georgia U.S.A.

Saxon Professor Emeritus of Chemistry - January 2018 - present
Department of Chemistry and Biochemistry
The University of Alabama
Tuscaloosa, Alabama, U.S.A.

Saxon Professor of Chemistry - October 1999 - December 2017
Department of Chemistry and Biochemistry
The University of Alabama
Tuscaloosa, Alabama, U.S.A.

Member of Research Staff, E. I. du Pont de Nemours & Company, Central Research and Development Dept., 1984 - 98

Appointed Research Leader - 1988 (Chemical Sciences)
Appointed Group Leader      - 1991 (Polymer Science Section)
Appointed Research Fellow  - 1995

Assistant Professor, University of Illinois, 1977-84

Member of Research Staff, E. I. du Pont de Nemours & Company, Central Research and Development Dept., 1976-1977

Gastdozent - 1999 - present
Institut für Anorganische und Analytische Chemie
der Technischen Universität Carolo - Wilhelmina
Braunschweig, Germany.