Sanneke de Haan is Associate Professor of Bioethics and Ethics of (Mental) Health at the Ethics Institute and Socrates Professor of Psychiatry and Philosophy at the Erasmus School of Philosophy at Erasmus University Rotterdam. She works on topics at the intersection of philosophy and psychiatry, in particular on questions around the boundaries of normality (when and on what grounds do we consider some states (ab)normal or pathological?), authenticity and its relation to mental health problems, and integrative approaches to psychiatric disorders. Her work typically combines philosophical analysis and qualitative research. 

From 2017-2023, De Haan received an NWO VENI grant for her project 'Is it me or my disorder? Relational authenticity in psychiatry' (Tilburg University). That project investigated 'self-illness ambiguity' in people with recurrent depressions: that is, how people relate to their depressions and medication in relation to their own identity. It also involved the development of a relational notion of authenticity.

Previously, De Haan conducted research on the experiences of adolescents prior to their first psychosis (Heidelberg University), and on the experiences of patients with Obsessive-Compulsive Disorders treated with deep brain stimulation (Amsterdam Medical Center). At The Berlin School of Mind and Brain (Humboldt University Berlin), she conducted research on neuroreductionism in psychiatry. 

Her book Enactive Psychiatry was published by Cambridge University Press in 2020. De Haan draws on insights from enactivism to develop an integrative view on the nature and development of psychiatric disorders.  

De Haan regularly gives public lectures and participates in public debates.