– 2013~Present: Associate Professor, UNST
– 2011~2013 : Assistant Professor, UNIST
– 2007~2011: Assistant Professor, State University of New York at Buffalo, U.S.
– 2005~2007: Ergonomist, Hayes & Associates, Inc. (forensic consulting), U.S.
– 2005~2005: Postdoctoral Researcher, Ergonomics Lab, North Carolina State Univ.