Professor (emeritus) of Analytical and Interface Chemistry, University of Regensburg

Bhabha Atomic Research Centre/Homi Bhabha National Institute /Fulbright Scholar

Professor of Analytical Chemistry College of Science, Qassim University, KSA.

Universiti Teknologi MARA

Asst. Professor in Chemistry, Vidyasagar College for Women (Under CU)

FoP - Hanoi National University of Education

Senior Lecturer in Materials Science & Engineering, University of Moratuwa

Ma Chung Research Center for Photosynthetic Pigments

Mechanical Engineering, Electrical Engineering, Sekolah Tinggi Teknologi Duta Bangsa