C4 Planning Solutions, Blythe, Georgia, is awarded a maximum ceiling $45,488,761 firm-fixed price, indefinite-delivery/indefinite quantity contract with a five-year ordering period and option to extend services up to six months for tactical systems support and professional engineering services for the Marine Corps Tactical Systems Support Activity. This contract contains an option, which if exercised, will bring the contract value to $49,999,196.  Work will be performed at Camp Pendleton, California (41 percent); Okinawa, Japan (15 percent); Camp Lejeune, North Carolina (four percent); Norfolk, Virginia (four percent); Alexandria, Virginia (four percent); Quantico, Virginia (four percent); New Orleans, Louisiana (two percent); and additional various locations outside the continental U.S. (26 percent), and work is expected to be completed by March 6, 2024.  If the option is exercised, work will continue through Sept. 6, 2024.  Fiscal 2017 (Marine Corps) operations and maintenance funds in the amount of $515,910; and fiscal 2019 (Marine Corps) operations and maintenance funds in the amount of $146,903 will be obligated under the initial task order immediately following contract award.  Although expired, the fiscal 2017 contract funds in the amount of $515,910 are available for this effort in accordance with 31 U.S. Code 1558.  The contract was competitively procured via the Federal Business Opportunities website, with two offers received. The Marine Corps Systems Command, Quantico, Virginia, is the contract activity (M68909-19-D-7605).