Keystone Foods has announced that William Andersen has rejoined the company as chief operating officer, reporting to John Coggins, executive vice president and chief financial officer.  “Bill’s long experience in our industry and his understanding of operations and customer needs will serve him well in this critical new role,” Coggins said.  In his new role, Andersen will be responsible for all global operations and facility management, including food safety and quality, engineering, and research and development.  Each of those division leaders will report to Andersen.