2022 

Organization Resummation, Evolution, Factorization (REF2022) virtual workshop hosted by University of Montenegro

2021

Organization Resummation, Evolution, Factorization (REF2021) virtual workshop at DESY

2020 

TERASCALE Summer School: Tutorial/Exercises - QCD and Monte Carlo techniques

2018

Chair of the Monte Carlo school of Terascale Alliance

since 2016

Organizing and Program Committee of the Resummation, Evolution, Factorization (REF) workshops 

2015

Chair of the Resummation, Evolution, Factorization (REF) workshop at DESY

2015

Chair of the Monte Carlo school of Terascale Alliance

2014

Initiator and co-chair of the Resummation, Evolution, Factorization (REF) workshop in Antwerp 

2012

Chair of the workshop MPI@LHC

2011

Chair of the workshop MPI@LHC

2009 

Chair of Monte Carlo school of Terascale Alliance

2008

Chair of Monte Carlo school of Terascale Alliance

2008

Chair of the workshop ``International Symposium on multiparton dynamics '' ISMD08        

2007

Chair of the workshop ``Elastic and diffractive scattering - forward physics and QCD ''

2003 – 2008

Initiator and chair of the workshop ``HERA and the LHC ''

2003 – 2006   

Convener of the physics working group ``Diffraction'' in H1.

April 2002

Coordinator of the working group ``Diffraction'',   DIS 2002, Cracow, April  2002. 

March 2001

Chair and coordinator of the `` Lund Small $x$ workshop'' 

2000 

Convener of the working group  ``QCD and Simulation'' at the THERA workshop (combination of TESLA with HERA).  

1999 – 2001 

Chair and coordinator of a project on Small x phenomenology involving physicists from Russia and the Lund theory group. This project is financed and supported by the Royal Swedish Academy of  Science. 

1998 – 1999 

Initiator  and chair of the workshop Monte Carlo Generators for HERA physics and editor of the proceedings.

1995 – 1996

Convener of the working group on Diffractive Hard Scattering at the workshop on Future Physics at HERA.

1991 – 1993

Convener of the physics working group Heavy Flavors at H1.

April 1995 

Convener of the working group on Proton and Photon Structure and Diffractive Interactions at the workshop on Deep Inelastic Scattering and QCD, Paris, April 1995.