PhD from Copenhagen University 1990. Docent at Stockholm University 1998.
Associate professor at Danish Bilharziasis Laboratory 1990-1992.
Research entomologist at Naturhistoriska Riksmuseet, Stockholm 1994-2004.
Associate professor at the Natural History Museum of Denmark, Copenhagen University 2004--present.
Member of the International Council of Zoological Nomenclature (from 2006), member of the Council for the International Congresses of Dipterology (from 2006, chair from 2010), member of the scientific advisory committee for Museum Koenig in Bonn (2004-2009, chair from 2006), serving on several scientific panels for SYNTHESYS (Stockholm, Budapest, London: 2002-2008). Editorial committees and advisory boards: Entomotropica, Studia dipterologica, Stuttgarter Beiträge zur Naturkunde (Ser. A), Tijdschrift voor Entomologie.