Associate Professor of Environmental Chemistry, Universiti Sains Malaysia

Professor of Environmental Chemsitry, Qatar University

University of Alberta

Baylor University

Kwame Nkrumah University of Science and Technology

CESAM & Chemistry Department, University of Aveiro

Pt. Ravishankar Shukla University

University of Tyumen

University of Concepcion

Chemist,Environmental Laboratory, Asia Arsenic Network