sentences:  Havenstein began his career in the defense industry at ITT Corporation's Aerospace and Communications Division.Havenstein has held executive roles at Raytheon, including vice president and general manager of the Strategic Systems Division, director of business development for the Communications Manufacturing Division, vice president and general manager of the Surveillance and Control Division, and vice president for Tactical Data Systems.Havenstein joined BAE Systems in 2000 when the company purchased Lockheed Martin Aerospace Electronic Systems, including its Sanders subsidiary of which he was president.