Leo de Bever quit the C$75.5 billion (US$56.3 billion) Ontario Teachers' Pension Plan Board, Toronto, to become executive vice president for MFC Global Investment Management. An MFC spokeswoman said he will help build the company's asset management business in North America and globally in addition to being responsible for North American equities and alternative products worldwide. He was also named chairman of the board of Hancock Natural Resource Group, Boston. Mr. de Bever had been senior vice president, research and economics, at the Ontario Teachers' fund. No decision has been made about a replacement.