[1] He passed studentexamen in Jönköping in 1944[1] and studied at the Royal Swedish Naval Academy in the end of the 1940s and graduated from Technical University of Denmark with a Master of Engineering degree in 1952.
[2] Winberg worked as an engineer at Husqvarna vapenfabrik AB from 1952 to 1953 and at Sundstrand Machine Tool Company in Rockford, Illinois, United States from 1953 to 1955.
[2] He advocated a weapons export policy without any restrictions whatsoever and periodically pursued an intensive lobby campaign towards Swedish defence politicians.
[2] It was during Winberg's leadership that Bofors become involved in Singapore, a strategic effort to increase weapons export in the entire Southeast Asia.
[2] In May 1984 Winberg was reported to the police by the Swedish Peace and Arbitration Society (SPAS) on charges of smuggling, for the alleged sale of RBS 70 to the illicit countries Dubai and Bahrain through Singapore.
[2] During the entire police investigation, Winberg strongly dismissed any participation in letting the weapon deliveries reach the unallowed countries Dubain and Bahrain.
[2] In December the same year, the three other former Bofors executives – Martin Ardbo, Lennart Pålsson and Hans Ekblom – where convicted by the court and given a conditional sentence for the illicit smuggling of goods.