Interim and inaugural head, Dept. of Electrical Engineering and Computer Science, 2022–4
Special Assistant to the President, U. Wyoming, 2021–2022
Member Scientific Advisory Board of the Applied Algebra and Optimization Research Center,
Sung Kyun Kwan University, 2016–2020 Special Assistant for Research Computing, U. Wyoming, 2010-2017
Interim Director of the Advanced Research Computing Center, U. Wyoming, 2014-2015
Department Head, Mathematics, U. Wyoming, 2006–2009
Professor, Mathematics, U. Wyoming, 2000–present
Associate Professor, Mathematics, U. Wyoming, 1995–1999
Assistant Professor, Mathematics, U. Wyoming, 1990–1995
Post-doctoral Fellow, Inst. of Math and its Applications, U. Minnesota, 1991–1992