University of Electronic Science and Technology of China, China
Metallurgical and Materials Engineering, Colorado School of Mines, CO, USA.
Senior researcher II, Ilie Murgulescu Institute of Physical Chemistry, Romania
"Dunarea de Jos" University of Galati, Romania
Scientist, RISE Research Institute, Sweden
Mackenzie Presbyterian University, Brazil
Central Metallurgical Research and Development Institute, Egypt
National Centre for Scientific Research - Montpellier university, France
Scientific Researcher III, National Institute for Lasers, Plasma and Radiation Physics, Romania
Vice Chancellor, Mahatma Gandhi University, Kerala, India
Portland State University, Portland, USA.