 CARY, N.C.--BUSINESS WIRE--Cornerstone Building Brands, Inc. NYSE: CNR the Company, the largest manufacturer of exterior building products in North America, today announced that Matthew Ackley has joined the Company as President, Engineered Building Systems. In his role, Mr. Ackley will lead Engineered Building Systems for the Commercial division, set strategic direction and work closely with customers to deliver long-term performance. He will assume the role effective immediately and w 