Sources Sought DEPT OF DEFENSE is seeking potential vendors for an engineering services effort regarding the B-2 ZSR Band 2 Antenna, LH Lower. This antenna is part of the B-2 DMS subsystem for receive and transmit functions and forms a portion of the outer mold line. The purpose of this effort is to resolve obsolescence, develop, and qualify a sustainable configuration for manufacturing. Potential vendors must be capable of evaluating the BOM, identifying obsolete parts and materials, proposing alternatives for long-term sustainment, and meeting all existing specification requirements. Northrop Grumman is currently the only known source with qualifications for this effort. Vendors must demonstrate capabilities in low observable applications, B-2 aircraft antenna repair and manufacturing, B-2 aircraft integration and environmental testing, and maintaining a quality system. Small businesses may be eligible for a set-aside portion of the requirement.