Yassemi is Professor of Mathematics at the University of Tehran. He completed his PhD in 1994 under supervision of Hans-Bjoern Foxby at the University of Copenhagen-Denmark. He is the Head of School of Mathematics, Statistics and Computer science at the University of Tehran (2014-2020). He was the Head of the School of Mathematics at the Institute for Research in Fundamental Sciences (2007-2009). In 2009 he received the KHWARAZMI international award in basic sciences and in the same year he received the COMSTECH international award. He was associated member of the Abdus Salam ICTP, Trieste-Italy (1996-2004). He visited prestigious institutes, Max-Planck Institute for Mathematics, Bonn-Germany, Institute des hautes etudes scientifiques, Paris-France and Tata institute of fundamental research, Mumbai-India, several times. In 2019 he was named Chevalier of the Ordre des Palmes Académiques for distinguished effort on extended multi-dimensional cooperation, including scientific research projects (Jundi-Shapur), student-and professor- exchanges, and several schools and conferences.