In 1946, Mr. Crena de Iongh became an Alternate Director of the International Bank and Monetary Fund., representing the Netherlands and the Union or South Africa, and also served as Acting Treasurer of the Bank. He was appointed Treasurer of the Bank on December 1, 1946.
Mr. Crena de Iongh has had a long financial career. From 1914 through 1939, he held various positions in the Netherlands Trading Society, including that of President. As an official of the Netherlands East Indies Government from 1940 through 1946, he was manager of the Exchange Control in the Indies and in charge of the financial interests of the Netherlands East Indies in the United Kingdom and the United States. He represented the Netherlands Government in the discussions with the U. S. Treasury in 1943 concerning plans to establish a monetary fund. He was also a member of the Netherlands' delegations to various international meetings, including the United Nations Monetary and Financial Conference held at Bretton Woods in 1944.
As an Executive Director of the Bank, Mr. Crena de Iongh succeeds Mr. A. M. de Jong of the Netherlands, who has resigned.