- Active Hot Stars including, Be, B[e], WR, O and LBV stars.
- Mass loss around hot stars
- Stellar winds
- Models (development of the SIMECA code)
- Non-LTE Radiative Transfer
- High angular resolution and large baseline optical interferometry
- Project Scientist of the VEGA/CHARA interferometer
- Exploitation of the AMBER and MIDI instruments on the VLTI