Professor of Organic Chemistry, Karlsruhe Institute of Technology (KIT)

University of Karachi

Professsor, University of Rhode Island

Michigan State University

School of Pharmacy, National and Kapodistrian University of Athens

Research Professor, Texas A&M University

Professor of Chemistry, Virginia Tech

University of Illinois at Chicago

Institute of Natural Medicine, University of Toyama

Chair of Natural & Medical Sciences Research Center, University of Nizwa