 Ramberg was also a practising lawyer and partner in the law office of Johan Ramberg (later Vinge & Ramberg, today Vinge) in Gothenburg and worked on the Boards of several corporations, such as Svenska Handelsbanken.From 1980 to 1985, he was the Chairman and Director of Transecure S.A. Luxemburg.As Vice President of the International Chamber of Commerce's Commission on International Commercial Practice and Chairman of a work group which in 1980, 1990, and 2000 prepared Incoterm document revisions, he was involved in international trade law and practices development for more than three decades.