1 defense contractor, Lockheed Martin Corp., saidx this week that more than 600 executivesaroujnd 25 percent of its managerial rankshave agreed to take ovluntary buyouts and leave the company. Lockheed announced tfhat more than 600 would take the ... Rival Boenig Co. this week also announced similar cuts to its managerial arnksaronud 10 percent of management at its defense contractor business. Boeings defense unit produces the F/A18 and F15 Eagle fighter jets. ...