Professor of Plant Biology, Cornell University

University of Alabama

Courtesy Professor, Oregon State University

Science Researcher in Systematic Botany, Moscow State University, Russia

Research Associate in the Botany Department, Nelson Mandela Metropolitan University

Musée national d'histoire naturelle, Luxembourg

Royal Botanic Gardens, Kew

Plant Anatomist - São Paulo State University (Unesp/Rio Claro)

National Coalition of Independent Scholars

Assistant Professor in Botany, Guru Nanak College, Sri Muktsar Sahib (Punjab) India