His research interests lie in transportation systems and construction materials. Jun has been with NAU for almost four years. To date, Jun and his research team have received 13 awards at national and international competitions, published 23 papers in peer-reviewed professional journals and conference proceedings, and presented 46 presentations at professional conferences. He has graduated at least 20 undergraduate students from his research lab, and many of them have successfully admitted to their chosen graduate school such as Columbia University, Northwestern University, Virginia Tech, University of California-Berkeley and University of Washington.