Northrop Grumman Aerospace Systems, San Diego, California, has been awarded a not-to-exceed $53,700,000 cost-plus-fixed-fee and cost reimbursable-no-fee, indefinite-delivery requirements contract for the RQ-4B Global Hawk.  The contract provides for repair services for “common items” for both the RQ-4 GH and MQ-4C Triton.  It will support reparable national stock numbers (NSNs) which encompass the air vehicle, multiple sensor packages, mission control element and launch and recovery element.  In addition, this effort includes support engineering services covered under the Engineering Delegation Authority (namely Diminishing Manufacturing Sources and Material Shortages projects) for NSNs transferred to and under the management of the 407th Supply Chain Management Squadron.  Work will be performed in San Diego, California; Salt Lake City, Utah; El Segundo, California; Sterling, Virginia; Las Cruces, New Mexico; Valencia, California; Joplin, Missouri; Vandalia, Ohio; Troy, Ohio; Longueuil, Quebec, Canada; Woodland Park, New Jersey; Whippany, New Jersey; Indianapolis, Indiana; Woburn, Massachusetts; Twinsburg, Ohio; Medford, New York; Cypress, California; Wichita, Kansas; San Jose, California; and Linthicum, Maryland.  The basic ordering period and six one year ordering periods are expected to begin Jan. 1, 2021, and end on Dec. 31, 2028.  Fiscal 2021‐2028 direct cite funds in the amount of $26,796,300 are being obligated at time of award.  This award is the result of a sole-source acquisition.  The Air Force Sustainment Center, Robins Air Force Base, Georgia, is the contracting activity (FA8539‐21‐D‐0001/FA8539-21-F-0007).