Doctor Magnus Simrén is working as Consultant in the Department of Internal Medicine, Sahlgrenska University Hospital, Göteborg, Sweden, and is Professor in Gastroenterology at the Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg. Doctor Simrén has a 50% research position in Molecular Gastroenterology at the Swedish Research Council 2011-2016.
He graduated from medical school, University of Gothenburg in 1991, and afterwards completed his internship and fellowship in internal medicine at the County Hospital of Lidköping. From 1998 to 1999, Doctor Simrén completed his fellowship in gastroenterology at Sahlgrenska University Hospital. He defended his thesis entitled Irritable Bowel Syndrome. Pathophysiological and clinical aspects in 2001. He was a research fellow at the University of Leuven, Belgium, in 2002, working with Professors Jan Tack and Daniel Sifrim, focusing on the pathophysiology of functional dyspepsia and GERD.
Doctor Simrén is now a principal researcher in the GI Motility Unit at Sahlgrenska University Hospital. His main research areas are the pathogenesis and pathophysiology of functional GI disorders, as well as the treatment of these. He has published more than 120 original articles and also written book chapters on GI motility diseases and functional GI disorders, and is currently supervisor for eight PhD students.

Doctor Simrén has been the President of the Scandinavian Association for Gastrointestinal Motility (SAGIM), and Scientific Secretary to the Swedish Society of Gastroenterology, and a served as council member for several international organizations. He is the chair of the United European Gastroenterology (UEG) Scientific Committee and member of the UEG council 2013-2017. Professor Simrén has also been working as Deputy Editor and Associate Editor of Gut, and is currently the Clinical Editor of Neurogastroenterology and Motiliy. He is also on the Rome Foundation Board of Directors since 2011, and led the Rome Foundation Working Team, "Intestinal microbiota in Functional Bowel Disorders 2010-2012.

In 2006 Doctor Simrén received the Rising Star Award from the Association of National European and Mediterranean Societies of Gastroenterology (ASNEMGE) and in 2007 a research award from the International Foundation for Functional Gastrointestinal Disorders.