Security Engineer - ISSE

Responsibilities Peraton is seeking incumbent and external qualified candidates to support North American Aerospace Defense Command (NORAD) Cheyene Mountain Complex (NCMC) – Integrated Tactical Warning/Attack Assessment (NCMC-ITW/AA) and Space Support Contract III (NISSC III).   Please note that this is contingent upon contract award, with an anticipated decision expected mid to late 2026    Qualified candidates will help operate, maintain, and sustain critical national mission systems to deliver resilient strategic threat warning and space capabilities as part of a world-wide architecture, providing strategic warning that our nation depends on during a conflict. This program will provide an opportunity to exploit the capabilities inherent in our diverse national systems to better meet the needs of the national command authority and warfighters to detect, track, and respond to strategic threats through 2030 and beyond   The  Security Engineer / ISSE  will support cybersecurity engineering, system security integration, risk management, and compliance activities supporting mission-critical NORAD and USSPACECOM operations within the Cheyenne Mountain Complex environment. This role will support security engineering efforts across complex operational and developmental environments supporting space, missile warning, command-and-control, and enterprise mission systems. The ideal candidate will possess experience integrating cybersecurity requirements into system architecture, engineering, testing, and operational sustainment activities within classified DoD environments while collaborating closely with systems engineering, software development, integration, and operations teams to improve system security, mission readiness, and operational resilience.  Responsibilities   Support cybersecurity engineering activities throughout the system lifecycle including design, integration, testing, deployment, sustainment, and modernization   Support implementation and integration of cybersecurity controls, security architectures, and defensive technologies across mission systems and enterprise environments   Assist with Risk Management Framework (RMF) activities including security control implementation, assessment support, POA&M management, and compliance documentation   Support system hardening, vulnerability assessment, patch management, and security remediation activities   Collaborate with systems engineering, software development, integration, and operations teams to ensure cybersecurity requirements are incorporated into system designs and deployments   Support security testing, verification and validation activities, vulnerability scanning, and operational security assessments   Analyze and troubleshoot cybersecurity issues, system vulnerabilities, and operational security incidents   Develop and maintain cybersecurity documentation including SSPs, security procedures, architecture artifacts, and technical assessments   Support continuous monitoring, audit readiness, and cybersecurity compliance activities within classified environments   Participate in Agile development, DevSecOps, and integration activities supporting secure system delivery and operational readiness   Contribute to continuous improvement initiatives focused on cybersecurity posture, system resilience, and mission assurance  Qualifications Required Qualifications   Bachelor’s degree with 5+ years of relevant experience; OR Master’s degree with 3+ years of relevant experience. Additional four (4) years of experience may be considered in lieu of degree   Active Top Secret clearance with SCI eligibility required, ability to obtain and maintain TS/SCI access required   Experience supporting cybersecurity engineering or ISSE activities within DoD, Intelligence Community, space, missile defense, or command-and-control environments   Experience supporting RMF, security compliance, and cybersecurity integration activities   Familiarity with NIST RMF, NIST SP 800-53, STIGs, security hardening, and vulnerability management processes   Experience supporting system accreditation, vulnerability remediation, and cybersecurity testing activities   Familiarity with Linux and/or Windows operating environments   Ability to collaborate across engineering, software development, integration, and operations teams   Desired Qualifications   Experience supporting NORAD, USSPACECOM, Space Force, missile warning, or space domain awareness missions   Experience supporting satellite ground systems, command-and-control systems, or enterprise mission systems   Familiarity with DevSecOps and secure system integration methodologies   Experience with cybersecurity tools such as ACAS, SCAP, HBSS, Splunk, eMASS, Nessus, or similar platforms   Familiarity with Zero Trust architecture and cybersecurity engineering best practices   Experience supporting cybersecurity activities within classified operational environments   CISSP, CASP+, Security+, or other DoD 8140/8570 compliant certification preferred  Peraton Overview Peraton 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 $104,000 - $166,000. This represents the typical