Duisenberg subsequently worked for the International Monetary Fund in Washington D.C. for years followed by a year as an advisor to the director of the Nederlandsche Bank, the Dutch central bank in Amsterdam.
From 1973 to 1977, Duisenberg was Minister of Finance under Prime Minister Joop den Uyl, Shortly afterwards, he gave up his seat in the Dutch parliament to become vice president of Rabobank, a Dutch bank.