Analytic Services Inc., Falls Church, Virginia (HQ0034-24-D-0011); Booz Allen Hamilton, McLean, Virginia (HQ0034-24-D-0012); CACI Inc. Federal, Chantilly, Virginia (HQ0034-24-D-0013); Leidos Inc., Reston, Virginia (HQ0034-24-D-0014); and Science Applications International Corp., Reston, Virginia (HQ0034-24-D-0015), are awarded a firm-fixed-price, labor hour, time-and-materials contract valued at $1,500,000,000 to perform cybersecurity; IT; information enterprise; and administrative and program subject matter expertise and support services. No funds are being obligated at time of award. The total, if all options are exercised, is $1,500,000,000. Services include activities such as strategic planning, capital planning, technology performance, assessments, research and analysis, architectures, modeling, hardware and/or software development and/or acquisition, standards development and evaluation, customization of software analytical tools, models, decision aids, screening methods and techniques, simulation and war-gaming, and day-to-day security and administration. The work will be performed in Alexandria, Virginia; and Baltimore, Maryland. The estimated contract completion date is June 27, 2029. Washington Headquarters Services, Arlington, Virginia, is the contracting activity.