My main research interest is in quantum field theories in curved space-time. In particular, I work on theories with local gauge symmetry and study the question of symmetry preservation at the quantum level. This consists of
1. General aspects of gauge theories, such as construction of algebra of physical, gauge-invariant observables,
2. Specific gauge theories with rigid superconformal symmetry in curved space-time and their BRST structure.
I have also previously worked on renormalization group flow equations in perturbative algebraic quantum field theories, as well as black hole singularities in loop quantum gravity.