In 1988 he became a member of the board of directors of the AMRO bank .
When the Amro merged with the Algemene Bank Nederland ( ABN ) in 1990 Groenink became a member of the board of the new group ABN AMRO .
In 1988 he became a member of the board of directors of the AMRO bank and when the Amro merged with the Algemene Bank Nederland ( ABN ) in 1990 Groenink became a member of the board of the new group ABN AMRO .