In July 1967, Korthals joined the Toronto-Dominion Bank as Superintendent, Term Financing. In November 1968, he became Superintendent of the National Accounts Division, and in February 1972, its General Manager. Korthals was appointed Vice-president, Administration in September 1972, Senior Vice-president in November 1976, and Executive Vice-president and Chief General Manager in May 1978. On 1 June 1981, Korthals succeeded
J. Allan Boyle to become the bank's fifth president. In September 1994, the bank announced that Korthals would retire on 31 January 1995, and would be succeeded as president by
A. Charles Baillie. Following his retirement, Korthals joined the
Ontario Securities Commission part-time as a commissioner. In May 1995, Korthals was elected chairman of
North American Life. He held the office until the company's takeover by Manulife at the end of that year. == Personal life ==