Theoretical particle physics at colliders, perturbative Quantum Chromodynamics, the phenomenology of the Standard Model, Higgs physics and beyond the Standard Model searches.
I teach the Master course Field Theory in Paricle Physics (a joint course with the Utrecht Theoretical Physics Master program), which deals with (non-abelian) gauge theories, renormalization and renormalization group, spontaneous symmetry breaking and the Higgs mechanism, and the Standard Model.
I am a member of the theory group at Nikhef, the national institute for subatomic physics. I also represent the Netherlands as scientific delegate to the CERN Council.