Systems Security Engineer SME

ResponsibilitiesPosition OverviewWe are seeking an experienced Systems Security professional to support the security, compliance, and operational readiness of mission-critical information systems. In this role, you will be responsible for safeguarding sensitive and classified systems and data while ensuring systems remain secure, compliant with applicable security requirements, and ready to support critical mission operations.What You'll DoSupport the planning, implementation, assessment, authorization, and continuous monitoring of information system security. Responsibilities will include:Serve as the Information Systems Security Approval Authority for systems under your control.Provide technical and compliance support for the organization’s Information Assurance (IA) program.Plan, coordinate, and enforce IT security programs across various systems and projects.Maintain the operational security posture for mission-critical information systems.Develop and enforce information system security policies, standards, and methodologies.Support day-to-day security operations, including system monitoring and incident response.Conduct vulnerability and risk assessments to support system certification and accreditation (C&A).Evaluate security solutions to ensure they meet requirements for handling classified data.Manage system configuration, changes, and security impact assessments.Security Documentation & ComplianceYou will be responsible for developing, maintaining, reviewing, and updating security documentation required to demonstrate system compliance and support authorization decisions. This may include:System Security Plans (SSPs)Risk Assessment ReportsCertification & Accreditation (C&A) packagesSystem Control Traceability Matrices (SCTMsWhat You'll BringThe ideal candidate will have a strong understanding of information systems security, cybersecurity risk management, security compliance, and the requirements associated with securing mission-critical and classified environments. You should be comfortable working across technical and programmatic teams and translating security requirements into practical solutions.QualificationsBasic Requirements:Active TS/SCI security clearance polygraph is required.Twenty (20) years of Systems Engineering experience on programs of comparable scope and complexity, with demonstrated expertise in planning and leading Systems Engineering efforts.Bachelor’s degree in a technical discipline (Computer Science, Information Systems, Engineering Science, or a related discipline)Five (5) years of additional relevant Systems Engineering experience may be substituted for a degree.Peraton OverviewPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.Target Salary Range$190,000 - $304,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.EEOEEO: Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.Job SummaryRequisition ID: 2026-172057Position Category: Information TechnologyClearance: Top Secret/SCI w/Poly