Information Systems Security Officer(ISSO), Mid (MCSES III)

Information Systems Security Officer (ISSO), Mid (MCSES III) Location: US-VA-McLean

ID: 2026-4378

Category: IT / Cyber Security / Network Systems Position Type: Full-Time Remote: No Clearance Required: Top Secret/SCI Overview AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of Information Technology, Test & Evaluation, Program Mission Support, Engineering & Analysis, and Training. Responsibilities Maintain the appropriate operational security posture for assigned Information Systems (IS)and networks in accordance with cybersecurity policies, directives, and Information Assurance (IA) Standard Operating Procedures (SOP). Ensure the Confidentiality, Integrity, and Accessibility of all IS resources, organic to the supported organization, maintain a high level of operational availability. Serve as the principle technical advisor to the Information Systems Security Managers (ISSM), Program Security Officers (PSO), and Delegated Authorizing Officials (DAO). Perform functional duties, as the alternate ISSM, to maximize operational readiness and effectiveness. Provide expertise, to maintain the Authority to Operate (ATO) and Authorization to Connect (ATC) for assigned IS, ensuring Risk Management Framework (RMF) compliance. Provide support to Program Management Offices (PMOs), by conducting site surveys and providing technical information, to develop RMF artifacts to support ATO/ATC and to facilitate IS deployments and successful integration. Perform IS lifecycle management to facilitate requirements engineering, procurement, integration, operational sustainment, and destruction. Provide the organization, subject matter expertise to prepare for cybersecurity, physical and personnel security assessments from senior management. Perform cybersecurity assessments for IS, within your area of responsibility, on a regular and consistent basis to identify potential vulnerabilities, evaluate the effectiveness of existing security controls, and ensure compliance with relevant policies and regulations. Develop supporting documentation, such as Plan of Action and Milestones (POA&M) and inspection reports, to coordinate events, capture discrepancies, and document remediation strategy for supported organizations. Develop and integrate policy and procedures to reinforce Access Controls (AC) for identified vulnerabilities. Participate in professional engagements with supporting and supported organizations, for successful collaboration, and to ensure assigned projects deliver desired results. Develop and maintain IS documentation to capture changes to the system, its operating environment, and to advise the Configuration Control Board (CCB) on ATO/ATC conflicts. Conduct cybersecurity audits and maintain audit record management, ensuring audit records are collected, reviewed, documented, and archived. Complete necessary, initial/annual, training to establish and maintain access to supported systems and networks. Qualifications 5 years of information systems management and cybersecurity experience. Active TS clearance with SCI eligibility. Proficient in firewall administration, intrusion detection systems, anti-virus software, and data encryption In-depth knowledge of information security principles and practices, including NIST SP 800-53 controls, DoD Risk Management Framework (RMF), and DoD Instruction 8510.01. Experience with cybersecurity RMF compliance and regulatory requirements. Strong analytical, problem-solving, and decision-making skills. Strong communication skills, adept at briefing executives and program IPT level leadership. Self-starter, strong work ethic, and willingness to be a contributing IPT member. Certifications Must possess an active DoD 8140/8570.01-M baseline certification at IAM Level II or higher (e.g., SecurityX CE, CySA+, CISSP, or CISM). Candidates without IAM Level II on day one may be considered if they currently meet IAT Level II and can obtain an IAM Level II certification within an agreed-upon timeframe. Pay Transparency Statement AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $140,000.00/Yr. - USD $160,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance. EEO Statement EEO Race/Sex/Disability Status/Veteran Status #J-18808-Ljbffr AMERICAN SYSTEMS