Oliver Moldenhauer studied Physics at the Universities of Oldenburg, Waikato (New Zealand) and Boulder (Colorado). He worked 1996-2000 at the Potsdam-Institute for Climate Impact Research before going on to co-found Attac in Germany. 2007-2013 he worked for Médicins Sans Frontières as a campaigner for the access to essential medicines. Today he serves as a volunteer board member for Médicins Sans Frontières Germany. Oliver lives in Berlin and Bielefeld.

Till 2021, Oliver served as the Executive Director of Investigate Europe, and is currently the Finance Director at Wikimedia Germany.