* Assistant Professor in Department of Mathematics in Damghan University (Damghan, Iran) 1998-2004

  * Associate Professor in Department of Mathematics in Damghan University (Damghan, Iran) 2004-2005

  * Associate Professor in Department of Mathematics in Ferdowsi University of Mashhad (Mashhad, Iran) 2005-2006

   * MR reviewer for American Mathematical Society

   Memberships:

  * Continuous Member Iranian Mathematical Society