David Wajsgras was named CFO and senior vice president of Raytheon Co., a $21.9 billion defense contractor based in Waltham, Mass. He succeeds Biggs Porter, who was Raytheon’s acting CFO since April 2005. Porter will remain Raytheon’s controller and vice president. Most recently, Wajsgras, 46, was CFO and executive vice president of Lear Corp., a $17 billion supplier of automotive interior products based in Southfield, Mich. Prior to joining Lear in September 1999 as controller and vice president, Wajsgras was corporate controller for Engelhard Corp. and held various financial positions at Honeywell International Inc.