Booz Allen Hamilton Inc., McLean, Virginia, is awarded a $21,444,735 firm-fixed-price, cost-plus-fixed-fee hybrid modification (P00021) to exercise Option Period 4 under previously awarded task order (M95494-18-F-0009). The work to be performed provides a variety of professional services to support Marine Corps Installations Command (MCICOM) Headquarters’ (HQ) directorates in fulfilling mission deficiencies and providing enhanced capabilities. Broad level task areas required are program management; logistics program support; information technology program support; operations support; planning support; government and external affairs support; facilities support; and enterprise content management support. Work will be performed in Arlington, Virginia (100%). Work is expected to be completed August 2023. Fiscal 2022 operation and maintenance (Marine Corps and Navy) funds in the amount of $21,444,735 will be obligated at the time of award and will expire at the end of the current fiscal year. MCICOM HQ, Arlington, Virginia, is the contracting activity (M95494-18-F-0009).