GDR SUSY, Tools Working Group (1996-2000)
European ECFA-DESY Linear Collider Series: Gauge Theories (1994-1996),
W Physics (1992-1993), Alternative Models (1991).
CERN LEP Workshops: Standard Model Processes (LEP2, 1994-1995),
Compositeness (LEP1, 1988-1989)
Les Houches, Physics at TeV Colliders (with the LAPTH Pheno Group)
Tools for SUSY (with Stavros Katsanevas, Lyon 1998-2000)