1- 2007 to 2012, Assistant Professor of Mathematics, University of Mohaghegh Ardabili, Ardabil, Iran.

2- 2012 to 2016, Associate Professor of Mathematics, University of Mohaghegh Ardabili, Ardabil, Iran.
3- 2017 up to know, Professor of Mathematics, University of Mohaghegh Ardabili, Ardabil, Iran.