2006-present

Tenure and Associate Professor, Department of Mathematical Sciences, Kent State University at Tuscarawas, OH, USA

2001-2006

Tenure-track Assistant Professor, Department of Mathematical Science, Kent State University at Tuscarawas, OH, USA

1996-2001

Teaching Assistant in Mathematics, Department of Mathematical Science, Kent State University, Kent, OH, USA

1994-1996

Teaching Assistant in Mathematics, Department of Mathematics and Statistics, Youngstown State University, OH, USA

1985-1989

Associate Professor, Vice Chair, Department of Mathematics, Harbin Normal College, Harbin, CHINA

1978-1985

Lecturer, Department of Mathematics, Harbin Normal College, Harbin, CHINA

1963-1978

Mathematics Instructor, Head of Math Department During 1974 to 1978, Harbin 1st High School, Harbin, CHINA