* Adjunct  Professor of Medicine, Gastroenterology Section,  Loyola University, Chicago, Illinois 1995- Present.  

* Professor of Medicine, Gastroenterology Section, University of California at Los Angeles, King/Drew Medical Center, 1984-1995.

* Adjunct Associate Professor of Pharmacology, Northwestern University Medical and Dental Schools, 1985-1995.

* Adjunct Professor of Pharmacology, Chicago Medical School, 1983-1990.

* Participated in teaching pharmacology and toxicology to medical students, dental students, graduate students, residents, fellows and house staff at UCLA, Northwestern and Chicago Medical Schools.

* Organized and chaired symposia at national and international meetings.

* Supervised thesis research of postdoctoral students (Ph.D./M.D.) and gastroenterology fellows.  Pioneered the organization of postdoctoral research program at Searle.  Also served as research advisor to undergraduate medical students who worked in my laboratory.

* Served as a guest lecturer on pharmacology and gastroenterology on many occasions, at graduate teaching institutions.

*Served in an ASPET sponsored program entitled "Activities of Pharmacologists in the Pharmaceutical Industry," for the purpose of interesting potential pharmacologists in a research career in the pharmaceutical industry.   

          * Served as a "Visiting Professor for Minority Institutions", a program sponsored by the Federation of American Societies for Experimental Biology to promote career development in biomedical research.