The Standard Model of elementary particles is a beautiful theory, but is thought to be only part of the description of the fundamental matter and forces constituents, and their interactions. At high-energy colliders, notably the LHC in CERN, experiments perform every more precise measurements to stress-test the Standard Model to the utmost. My research involves the theoretical side of this, providing the most precise predictions thereto, and developing new theoretical methods and tools for this. In particular higher order predictions due to Quantum Chromodynamics are important. I have worked on finite order corrections for many reactions, especially involving the top quark, Higgs and vector bosons. A particular interest has been how to sum the largest parts of perturbative corrections to all orders, for which I have, together with collaborators, developed a variety of new methods. The extension of this effort to soft power corrections is a recent focus of my research, requiring new perspectives on the factorizing structure of amplitudes and cross sections, and new ingredients for this. 

Since 2016 I represent the Netherlands in the CERN Council, since 2022 as a vice-president. Also since 2022 I act as director of the Institute of Physics at the University of Amsterdam.