Gerard Roelfes obtained his MSc and PhD (2000) from the University of Groningen, the Netherlands. His PhD research (supervisor Prof. Ben L. Feringa) was on synthetic models for non-heme iron oxygenases, which was a joint project with Unilever Research and the group of Prof. Lawrence Que Jr. (Univ. Minnesota), in whose lab he carried out part of the work. After his PhD he went for a post-doc with Prof. Donald Hilvert in the Laboratorium fur Organische Chemie of the ETH-Zurich (Switzerland), where he worked on synthetic strategies towards seleno-proteins, using a combination of chemical and biological methods. In 2003 he returned to the University of Groningen as a junior research group leader. He became Assistant Professor in 2006, Associate Professor in 2010 and since 2015 is Full Professor of Biomolecular Chemistry & Catalysis. Among others, he is the recipient of a prestigious Vici innovational research award from the Netherlands Organization for Scientific Research and an ERC starting grant. His research interests include: DNA-based catalysis, enzyme design, chemical biology and catalytic chemistry in the living cell.