Northrop Grumman Systems Corporation (NGSC) in Chandler Arizona is being awarded a $10,542,244 modification to a previously awarded Contract HQ0147-19-C-0005 to exercise a Static Fire Castor IV-B Test. The value of this contract is increased from $343,945,282 to $354,487,526. Under this modification, the contractor will perform pre-test analysis to predict standard motor performance parameters such as pressures, temperatures, thrust, and thrust vector control. NGSC will also design and fabricate the test tooling, incorporate instrumentation, conduct a Test Readiness Review, conduct the test, and provide a final report detailing the motor performance. The motor used will be a Castor IV-B Rocket Motor, which is owned and produced by Northrop Grumman. The work will be performed in Chandler, Arizona and Promontory, Utah. The performance period is from November 2022 through February 2024. Fiscal Year 2023 Research, Development, Test and Evaluations (RDT&E) funds will be used on this effort; however, no funds are being obligated at this time. A Sources Sought Notification was posted on SAM.gov and only one response was received. The Missile Defense Agency, Redstone Arsenal, Alabama is the Contracting Activity.