| September 2025: | Invited professor, University of Kyoto (RIMS), Kyoto, Japan |
| July – August 2024: | Invited professor, Universitat Kassel, Kassel, Germany |
| August 2023: | Invited professor, University of Rikkyo, Tokyo, Japan |
| July – August 2022: | Universitat Kassel, Kassel, Germany, (Erasmus+ program) |
| July – August 2019: | Universitat Kassel, Kassel, Germany, (Erasmus+ program) |
| June – July 2019: | Invited professor, Universite Paris XIII, France |
| 2016-2018: | Center for international scientific studies and collaboration (CISSC) and Universite Paris XIII |
| June – August 2016: | Universitat Kassel, Kassel, Germany, (DAAD grant) |
| June – August 2013: | Universitat Kassel, Kassel, Germany, (DAAD grant) |
| 2012-2014: | Center for international scientific studies and collaboration (CISSC) and Universite Paris XI |
| June – September 2011: | JINR, Group of Algebraic and Quantum Computations, Doubna, Russia |
| February – July 2006: | Special semester on Grobner Bases and related methods RISC, RICAM, Linz, Austria |
| 2002 – 2006: | Iranian Ministry of Science, Research and Technology Scholarship for Ph.D. Program |
