until March 2012

Appointed Member in advisory board of the German Engineer Association VDI-Expert group Renewable Energies
 (VDI Fachausschuss Erneuerbare Energie)

until End 2010

Vice President of the Germanischer Lloyd Expert committe for Certification and periodic inspection of Wind Power Plants

2003 - 2009

Chairman of the Scientific Board "Bundesverband Windenergie"
(German Wind Energy Association)