He has an extensive global range of clients. In the German language area he was voted the most influential living management thinker (after the late Peter Drucker).
Before committing himself entirely to management consulting, Simon was a professor of business administration and marketing at the Universities of Mainz (1989-1995) and Bielefeld (1979-1989). He was also a visiting professor at Harvard Business School, Stanford, London Business School, INSEAD, Keio University in Tokyo and the Massachusetts Institute of Technology. From 1995 to 2009 he was CEO of Simon-Kucher & Partners. His Hirsch-Index is 51.
Professor Simon has published over 35 books in 26 languages, including the worldwide bestsellers Hidden Champions (Boston 1996, cover story of BusinessWeek in 2004) and Power Pricing (New York 1997), as well as Manage for Profit, Not for Market Share (Boston 2006). His book Hidden Champions of the 21st Century, Success Strategies of Unknown World Market Leaders (New York 2009) investigates the strategies of little known market leaders. His book Confessions of the Pricing Man was published by Springer, New York in October 2015. Price Management, the US version of his leading German textbook, will be published in 2017.