Booz Allen Hamilton Inc., McLean, Virginia, is awarded a $22,986,018 firm-fixed-price and cost-plus-fixed-fee hybrid modification, P00018, to exercise Option Period Three under previously awarded contract M95494-18-F-0009. The work to be performed provides a variety of professional services to support Marine Corps Installation Command Headquarters (MCICOM) 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. Work is expected to be completed August 2023. Fiscal 2021 operation and maintenance (Marine Corps) funds in the amount of $20,890,018 will be obligated at the time of award and will expire at the end of the current fiscal year. MCICOM Headquarters, Arlington, Virginia, is the contracting activity.