Current committees:

International Conference on Computational Science and Its Applications (ICCSA 2010) , Fukuoka, Japan, March 2010, program committee.

The Conference on Partitioned Global Address Space PGAS Programming Models, George Washington University, October 2009, program committee.

Facing the Multicore-Challenge, Heidelberg Academy of Sciences, Heidelberg, Germany, March 2010, program committee.

European MPI Users' Group, Stuttgart, Germany, September 2010, program committee. (Formerly the European PVM-MPI Users' Group.)

SCxy conference:

Deputy chair, tutorials committee, 2002.

Technical papers committee member, 2001, 2003.

Tutorials committee member, 1999, 2001, 2007.

IEEE International Parallel and Distributed Processing Symposium, Miami, FL, USA, March 2008, program committee.

Parallel Tools Consortium:

Steering committee member, 1996-2002. (Consortium disbanded.)

General chair, Annual Meeting, 2002.

Program committee member, 1998.

PVM and MPI conferences:

European PVM-MPI Users' Group, program committee, 1996-97, 2006-09.

PVM User's Group Meeting, organizing and program chair, 1996.

IEEE International Conference on Cluster Computing:, San Diego, CA, September 2004, posters chair and program committee.

International Conference on High Performance Computing and Communications, September 13-15, 2006, Munich, Germany, program committee.

Cluster Computing Conference, Atlanta, 1997, program committee.