Officials for IBEW Local No. 640, Phoenix, with $70 million in pension assets, hired NWQ Investment Management and Boston Partners, said Sheri Lass, contract administrator. Each will manage $10 million in balanced strategies, Ms. Lass said. The money came from taking $10 million each from Smoot, Miller, Cheney & Co., which will keep $30 million, and Boston Co. Asset Management, which will keep $20 million. Merrill Lynch assisted.