Viktor was born 1944 in Vienna, grew up in Wolfsburg and studied engineering and physics in Hamburg. He is married with four children. In 1978 his family moved to Munich where he worked for 2 years in the Max-Planck-Institute for Laser-research and then at the German-French helicopter company Eurocopter, now called Airbus Helicopters, until 2006. Parallel to this work he established the company Kalteng Consultants in 1995, which works mainly in the area of remote sensing in Kalimantan. Viktor has been part of the Susila Dharma Germany team since 2007, working to support several projects including the successful YUM-AGRO project in Kalimantan supported by the German development agency BMZ. He was chair of SDG from 2013 to 2015.