Rolf started his career as a CPA with a Big-4 audit Firm in Switzerland and South Africa. Upon qualifying he set up Hess Consulting Group back in 1985, in the age of 30. Gradually he built up the business into a major consulting firm in Switzerland with 70 employees. The Firm also became the representative office of Grant Thornton for the country and was renamed Hess Grant Thornton. Eventually the business was sold to another firm in a multi-million-dollar transaction.