GMC Joop van Oosterom was born in Hilversum on December 12th, 1937, five days after Max Euwe lost the world title. His brother is Henny van Oosterom. Joop's first notable chess success occurred in April of 1955, when he became the Dutch Youth Champion in Enschede. However, financial and professional interests would soon separate him from competitive chess for many years.
In 1966, two ex-IBM employees, Van Oosterom and J. C. Mol, founded the Automation Center Volmac, the first Dutch software company. In 1988 Volmac went public and they became multi-millionaires, obtaining cash and stock for their stake in the company. The Dutch financial magazine "Quote 500" estimated that Van Oosterom's net worth was over 1 billion euros.
By the early 1980s, Van Oosterom was secure enough to devote attention to his first love. He was Dutch correspondence chess champion in 1980-1981, and played in a number of other correspondence events, including winning the Three-Quarter-Final Candidates section of the 14th World Championship which began November 1987, and was awarded the CC-IM title as a result. In February of 2005, Van Oosterom achieved his lifelong goal, winning the 18th World Correspondence Chess Championship Final. In 2008, he won the 21st World Championship Final.
At the time of the 2005 Championship Final van Oosterom had hired the strong grandmaster Jeroen Piket as his personal secretary. Earlier, van Oosterom had had two Dutch International Masters on his payroll whose job was to analyse his correspondence games. Tim Krabbe wrote: "The Turk was operated by William Schlumberger, Mephisto was operated by Isidor Gunsberg, Ajeeb was operated by Harry Nelson Pillsbury and Joop van Oosterom is operated by Jeroen Piket."
A true philanthropist, Van Oosterom became involved in chess sponsorship, through the Max Euwe Association that he founded. Starting in 1992, he began to sponsor the innovative Melody Amber tournaments, involving leading GMs in both rapid and "blindfold" games. This tournament was conducted annually for 20 years.
Wikipedia article: Joop van Oosterom