We are seeking a Cyber Security Information System Security Office (ISSO) Subject Matter Expert (SME) to help support our DEOS contract in either Chantilly, VA or Fort Meade, MD. The Cyber Security ISSO SME will perform or review technical security assessments of computing environments to identify points of vulnerability, non-compliance with established IA standards and regulations, and recommend mitigation strategies. Provide support to senior ISSOs for implementing and enforcing information systems security policies, standards, and methodologies. Develop and maintain documentation for Assessment & Authorization (A&A) in accordance with DISA and DoD policies. Develop system security policy and ensure compliance. Evaluate security solutions to ensure they meet security requirements for processing classified information. Maintain operational security posture for an information system or program. Develop and update the Body of Evidence (BoE), System Security Plan (SSP), and other IA documentation. Assist with the management of security aspects of the information systems and perform daily security operations of the system. Provide support for a program, organization, system, or enclave's information assurance program. Ensure familiarity with DoD and SOP for managing cyber security compliance and risk management processes. Provide necessary services including A&A support, cyber security authorizations process support, continuous monitoring support, and ISSO support.