Marloes is conducting clinical research focusing on the effectiveness and working mechanisms of mindfulness-based interventions in mental health care. As a psychologist and senior researcher, Marloes is involved in a number of randomized controlled trials investigating mindfulness- and compassion-based interventions for patients with recurrent depression, bipolar disorder, and inflammatory bowel diseases, particularly looking at clinical and cost-effectiveness. Marloes is also working as a mindfulness teacher of MBSR and MBCT since 2014.