KNOXVILLE, Tenn.–(BUSINESS WIRE)–r4 Federal, the defense-focused operating unit of r4 Technologies, announced it has been selected as an awardee on the Missile Defense Agency’s (MDA) Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award indefinite-delivery/indefinite-quantity (IDIQ) contract vehicle, with an estimated ceiling value of $151 billion supporting the Golden Dome Initiative. The SHIELD program is central to MDA’s mission to accelerate the development, inte