Kaiser Aluminum Corporation announced that its Board of Directors has appointed Michael C. Arnold and Kevin W. Williams to serve as independent directors. Mr. Arnold was the President and Chief Executive Officer of Ryerson Inc. Mr. Williams serves as President and Chief Executive Officer of GAA Manufacturing and Supply Chain Management, a third party logistics and supply chain management company, and one of the country's largest African American owned businesses. Prior to joining Ryerson Inc., Mr. Arnold held various senior management positions with The Timken Company from 1979 to 2010, including Executive Vice President; President, Bearings and Power Transmission Group; President, Industrial Group; Vice President, Bearings and Business Process Advancement; Director, Bearings and Business Process Advancement; and Director, Manufacturing and Technology, Europe, Africa and West Asia (Europe). Mr. Kevin W. Williams Prior to joining GAA Manufacturing and Supply Chain Management, Mr. Williams served as President and Managing Director of General Motors of Canada Limited and Vice President and General Manager, Global Service and Parts Operations of General Motors Company.