Party affiliation: Liberals
- Advisory Royal Dutch Shell Group, London and The Hague, Netherlands, 1952-1974, senior executive marketing, 1974-1976, oil trader, 1976-1980. Founder, owner, managing director Interstate Commerce Commission Indiana Coal Company and R.S.V. Mining Equipment B.V., The Hague, since 1974. Director Hy-Test Europe B.V., The Hague, Hy-Test Holding N.V., Holland Coal Company N.V. (both Curacao, Netherlands Antilles), Minetech Holdings Ltd., Guernsey, International Mining Technology Inc., Lexington, Kentucky, Foremco Corporation, Lexington, Interstate Commerce Commission Inc., Houston, Tradimex Precisie Produced B.V., Vianen, Netherlands, Tradimex Real Estate, Voorburg, Netherlands, Multifoam B.V., Varsseveld, Netherlands, North America Mining Services, Inc., Lexington, Holland American Energy Systems Corporation, Corona del Mar, California.