The Wisconsin state investment board, which is charged with managing nearly $118-billion in assets, including pension funds for current and retired state workers, has a new leader. David Villa was named Monday as the new executive director of the State of Wisconsin Investment Board. He has served as the chief investment officer of the investment board since 2006. He will continue to serve as chief investment officer while also working as the executive director. The vast majority of the assets managed by the board, $107-billion of it, is with the Wisconsin Retirement System: that WRS is the ninth largest public pension fund in the country.