He has worked with children and families doing diagnostics, counseling, and supervision. In 1995, he became professor of special education at the Catholic University of Applied Sciences in Freiburg (Germany), serving as head of institute of research and development and president. In 2007 he became director of the School of Applied Psychology and the Institute of Applied Psychology, Zurich, and in 2013 adjunct professor at Ryerson University, Toronto (CA). He is a member of the International Association of Applied Psychology and the International Society for Third-Sector Research (ISTR), and is also vice president of the European Federation of Psychologists’ Associations (EFPA) and president of the Conference of Applied Psychology of Swiss Universities, Switzerland.