William J. Malouin is retiring as chief executive officer of Sceptre Investment Counsel Ltd., Toronto. He will be succeeded by Richard L. Knowles, president and chief operating officer. Mr. Knowles will remain president, and the company will choose a new COO; Mr. Knowles declined to discuss the search. Also, J. Douglas Grant, a founding partner of Sceptre, resigned as chairman but will remain a director. W. Ross Walker, an independent director since 1997, was named chairman.