Professor Begquist has a background as MD, Associate Professor of Clinical Neuroscience , Sahlgrenska University Hospital and the University of Gothenburg. Since 1999 , he has been a researcher in Uppsala, Sweden, and in 2005 was appointed professor of analytical chemistry and neurochemistry at the Department of Chemistry - BMC , Uppsala University. From 2011 he worked also as an adjunct professor of pathology at the University of Utah, Salt Lake City, Utah, USA.
Professor Bergquist is also one of the founding members of the European ME Research Group (EMERG).