British Aerospace Engineering Systems Technology Solutions & Services Inc., Rockville, Maryland (N00421-D-0035); Coherent Technical Services Inc.,* Lexington Park, Maryland (N00421-D-0036); Engility Corp., Andover, Maine (N00421-D-0037); J.F. Taylor Inc., Lexington Park, Maryland (N00421-D-0038); KBRwyle Technology Solutions LLC, Columbia, Maryland (N00421-D-0039); Lockheed Martin Rotary and Mission Systems, Manassas, Virginia (N00421-D-0040); and Valkyrie Enterprises Inc.,* Virginia Beach, Virginia (N00421-D-0041), are each awarded indefinite-delivery/indefinite-quantity contracts. The estimated aggregate ceiling for all contracts is $235,005,530, with the companies having an opportunity to compete for individual orders. These contracts provide for Air Traffic Control and Landing Systems Operations Onboard Ship and Shore support services for the Naval Air Warfare Center Aircraft Division (NAWCAD) – Air Traffic Control and Landing Systems Division (NAWCAD 4.11.7). Services to be provided include operational, technical, logistical and system engineering support for system certification; technical assistance; systems analysis and engineering; test and evaluation; installation and maintenance; hardware design, development, technical logistics support; configuration management; training support; equipment manufacturing; quality control; and project management of Mobile Air Battle management systems and communication-electronic systems.