2019 – present  Board of Advisors, Klinika Digitale, Kosovo

2013 – present  Board of Advisors, Healthcare Centre of Excellence, Kosovo/ USA

2012 – present  Board of Advisors, Mars One

2005 – 2017  Board of Advisors, Rays of Hope Foundation, Switzerland.

2012 – present  Professional Member of International Association for the Advancement of Space Safety (IAASS).

2010 – 2012  Member of ESA Knowledge Management Working Group.

2010 – 2012  Member of European Cooperation for Space Standardization (ECSS).

2005 – 2007  Visiting participant of the eHealth Standardization Focus Group (eHSFG).

2004 – 2007  Member of NATO/COMEDS Telemedicine Panel - TMED (subgroup of COMEDS: COmmittee of the chiefs of the military MEDical Services in NATO).

2004 – 2006  Visiting participant of EHTEL (European Health Telematics Association) Group of Health Care Authorities (HCA).

2002 – 2006  Founding Member of Telemedicine Alliance team (TMA: ESA, WHO, ITU, with EC)

2000 – 2001  Member of ad hoc Working Group on Multicultural & International Issues in Spaceflight Research & Healthcare, of the NSBRI (National Space Biomedical Research Institute, Houston, Texas).

1994 – 1998  Member of Working Group for Space Medicine, DGLRM (Deutschen Gesellschaft für Luft- und Raumfahrtmedizin – German Aerospace Association).

1993 – 1998  Member of Committee on Life Sciences, Subcommittee on Human Factors - International Academy of Astronautics/ International Astronautical Federation (IAA/IAF).

1994 – 2014  Member of German Association for Aerospace Medicine (DGLRM).

1990 – 1991  Member of ad hoc HERMES Spaceplane Cockpit Working Group - HSCWG.

1985 – present  Correspondent in Gravitational Physiology International Union of Physiological Sciences (IUPS), Commission on Gravitational Physiology.

1985 – 1988  Member of Columbus Crew Activities Working Group (ColCAWG)

1983 – 1986  Member of Spacelab-D1 Investigators' Working Group (IWG)

1980 – 1988  Member of Space Sled Experimenters' Team

1980 – 1984  Member of Spacelab-1 Investigators' Working Group (IWG)