Research Associate Professor and Adjunct Research Faculty, International Arctic Research Center (IARC), University of Alaska Fairbanks (UAF), part-time remote, Indianapolis, IN (July 2012-January 2021)
Research Assistant Professor, IARC, UAF (2004-2012)
Associate Faculty, Department of Chemistry and Biochemistry, UAF (2004-2018)
Adjunct Lecturer, Indiana University-Purdue University Indianapolis, Department of Earth Sciences (Spring 2011)
Research Scientist, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Yokohama-city, Japan; dispatched to UAF (2001-2004)
Postdoctoral Researcher, IARC, UAF (1999-2000)
Visiting Assistant Professor, Department of Chemistry and Biochemistry, UAF (Academic year 1998-1999)
Research Associate, Arctic Research Consortium of the United States, Fairbanks, Alaska (Summer 1998)
Lecturer, Department of Chemistry and Biochemistry, UAF (Spring 1998)
Chemist III – Quality Assurance Specialist, State of Alaska Department of Environmental Conservation (ADEC), Fairbanks (1989-1992)
Chemist II – Laboratory Analyst, ADEC, Juneau, Alaska (1987-1989)