The aerospace and technology arm of Jacobs -- a Dallas-headquartered company best known for its global engineering and construction services -- upset incumbent Northrop Grumman by winning a potential $4.6 billion follow-on contract to support the Missile Defense Agency, its first successful major foray into government missile-defense business. On Aug. 9, the MDA awarded Tullahoma, TN-based Jacobs Technology Inc. a $4.3 million task order as part of an indefinite-delivery, indefinite-quantity contract potentially worth $4.6 billion for what the agency has...