This requirement is to provide HQMC Command, Control, Communications, and Computers (C4) services to support cybersecurity capability deliverables, including Risk Management Framework (RMF) Authorization and Assessment and Authorization (A&A), cyberspace defense, and Communications Security (COMSEC) Key Management Infrastructure (KMI) management efforts. RMF A&A capability provides the overall management and execution of actions for the process as directed by federal law, Department of Defense (DoD), Department of Navy (DON), and Marine Corps policy and directives. Cyberspace defense specialized support capability provides independent active assessment, defense, and response to cyber incidents as directed by DOD, DON, and Marine Corps. COMSEC KMI management capability supports the accounting and management of special cryptographic devices as directed by the National Security Agency (NSA). Capabilities range from the Marine Corps enterprise, spanning tactical, garrison, legacy, and cloud-based capabilities on both the unclassified and classified levels. The Contractor will be required to provide all the end-user devices to be used in this requirement.