Professor of Geology, Curtin University

Instituto de Estudios Andinos Don Pablo Groeber (UBA-CONICET)

Mahasarakham University

Principal Research at IDEAN (UBA-CONICET)

Universidade do Vale do Taquari - Univates

Scientist-E, Birbal Sahni Institute of Palaeobotany (Department of Science and Technology) …

Universidade Federal do Piauí, Centro de Ciências da Natureza

Physycs and Geology Department, University of Perugia

Profesor-Investigador, UANL

Iziko South African Museum