After graduating from McGill University with a B.A. degree, in 1951, he joined the family Business, where he worked as an accounting clerk and apprentice taster. In 1953, he took over as head of the Seagram U.S. subsidiary, Joseph E. Seagram & Sons. He increased the range of products sold by the company, improved distribution, and expanded the number of countries in which Seagram's products were sold. In 1966, Cemp Investments, which managed the family's Investments, bought 820,000 shares of MGM and, in 1969, Bronfman took over the chairmanship of MGM, albeit briefly.