[1]   2015.4 to  Now
University of Science and Technology Beijing  | Professor, Ph.D. Supervisor
[2]   2017.12  to  2019.1
University of Wollongong, Australia  | Distinguished visiting professor and visiting professor
[3]   2017.6 to  Now
McGill University, Canada  | Guest professor
[4]   2013.4  to  2015.4
North China Institute of Science and Technology  | Chair
[5]   2010.4  to  2013.4
China Academy of Work Safety Science and Technology  | Chair
[6]   2000.4  to  2010.4
National Administration of Work Safety  | Deputy Director
[7]   1996.4  to  2000.4
China University of Mining and Technology  | Principal Assistant  | Professor
[8]   1994.4  to  1995.4
China University of Mining and Technology  | Postgraduate Division Director  | Professor
[9]   1987.4  to  1994.4
China University of Mining and Technology  | Assistant Professor
[10]   1985.4  to  1987.4
China University of Mining and Technology  | Teaching Assistant