Willem Nolen has retired as Professor of Psychiatry at the University Medical Center Groningen in February 2013. Before he moved to Groningen he worked in The Hague and in Utrecht, where he was principle investigator of the Utrecht site of the international Stanley F fundation Bipolar Network (1995-2002).
In Groningen he was head of the Department for Affective Disorders and scientific coordinator for the clinical studies in affective disorders. From 2004-2011 he was principle investigator of the Groningen site of the Netherlands Study on Depression and Anxiety (NESDA), a Dutch multi-center 8 years follow-up study in respondents (n=2,981) with depressive and/or anxiety disorders. After his retirement he remains the principle investigator for the bipolar cohort in MOODINFLAME, a collaborative European study on inflammation and autoimmune disturbances in mood disorders that started in 2008.
Hismajor research interest is mood disorders, both bipolar disorder and major depression, in which he has been involved in research on epidemiology, etiology, long-term course and treatment. A main part of his research has focused on the different pharmacological treatment options in bipolar and unipolar mood disorders and their place in guidelines and algorithms.
He has published over 400 papers, many of them in international journals or as chapters in international books. He has been member of the editorial board of the Dutch Journal of Medicine (NTvG) and of the Dutch Journal of Psychiatry (TvP), is currently member of the editorial board of Bipolar Disorders and the International Journal of Bipolar Disorders and serves as editorial consultant for several international journals.In 2007 he received the annual award for scientific research of the Dutch Psychiatric Association (NVvP).
For the International Society of Bipolar Disorders (ISBD) he is President from 2012 to 2014.