1. Research Associate Professor, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Qatar (2022 to Current)
  2. Assistant Professor, Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Qatar (2018 to 2021)
  3. Associate Professor, Department of Chemistry, Faculty of Science, Cairo University, Egypt (2016-2021)
  4. Senior researcher, Gas Processing Center, College of Engineering, Qatar University, Qatar (2012 to 2017)
  5. Assistant Professor, Department of Chemistry, Faculty of Science, Cairo University, Egypt (2007 to 2016)
  6. Postdoctoral research associate, Texas A&M University at Qatar (2010 to 2012)
  7. Postdoctoral research associate, Free University of Berlin, Germany (2006 to 2007)
  8. Ph.D. candidate, Free University of Berlin, Germany, funded by DFG (Deutsche Forschungs Gemeinschaft) (2002 to 2006)
  9. Teaching Assistant, Free University of Berlin, Germany (2001 to 2005)
  10. Lecturer Assistant, Department of Chemistry, Faculty of Science, Cairo University, Egypt (2001)
  11. Demonstrator, Department of Chemistry, Faculty of Science, Cairo University, Egypt (1995 to 2000)