Teaching assistant in genetics and physiology at the University of Iceland, and research assistant at Biological Institute, University of Iceland, 1981-1983.
Teaching Assistant in developmental biology and physiology at department of Zooloy, University of Manitoba, 1985-1987.
Research Assistant at the Freshwater Institute at the University of Manitoba, 1983-1991.
Lecturer at the University of Iceland from February 1st 1991, to January 31st 1993.
Assistant Professor in Physiology at department of physiotherapy, University og Iceland, 1993-1997.
Associate Professor in Physiology from November 1st, 1997.
Professor in Physiology from July 1st, 2013.