Museum für Naturkunde, Berlin

Founder of Phylogenetics, Dipterist

Director, Australian National Insect Collection, CSIRO

Natural History Museum of Denmark, University of Copenhagen

EIS, Naturalis Biodiversity Center

Research Entomologist (Emeritus), Department of Entomology, Smithsonian Museum of …

Hungarian Academy of Sciences

National Museums Scotland

Professor. University of Guelph

USDA and Dept. Entomology, National Museum of Natural History, Smithsonian Institution