DivcoWest, the San Francisco developer that acquired the long-stalled NorthPoint mixed-use development site in Cambridge this summer for $291 million, has hired three members to lead its development team for the 42-acre property.

Tom Sullivan, founder of San Francisco-based developer Wilson Meany Sullivan, has been named president of the Cambridge-based development division.

Mark Johnson, former vice president of Harvard’s Capital Planning and Project Management division, is the new director of development. Mark Roopenian, a former principal at Normandy Real Estate Partners, is Northpoint’s new managing director.

The NorthPoint site is permitted for 4.5 million square feet of residential and commercial development.

DivcoWest has been an active buyer and seller of office buildings in Boston and Cambridge in recent years. It acquired NorthPoint from Boston-based HYM Investment Gorup and Canyon-Johnson Urban Funds, a real estate group led by former NBA star Magic Johnson.

“We believe that NorthPoint will be a significant economic engine for creating jobs in Cambridge, Somerville and Boston,” DivcoWest CEO Stuart Shiff said in a statement. “Our goal for this new community is to have a significant and transformative impact on the broader Cambridge and Boston communities.”