Senior Security Systems Engineer with Security Clearance

Data Intelligence LLC is seeking an experienced Senior Security Systems Engineer to support one of our premier Navy customers in Dahlgren, VA. This role provides advanced cybersecurity engineering and systems security support to U.S. Navy tactical and strategic weapons programs. The successful candidate will lead efforts related to Assessment & Authorization (A&A), Risk Management Framework (RMF) implementation, vulnerability management, and secure systems design for complex afloat and shore-based systems. This position is fully on-site in Dahlgren, VA. This position is contingent upon winning contract award. Key Responsibilities * Lead cybersecurity engineering and systems security integration for U.S. Navy programs, with specific focus on tactical combat and Submarine-Launched Ballistic Missile (SLBM) systems. * Perform system security engineering in accordance with DoD, DON, and NIST cybersecurity policies, standards, and best practices. * Execute the full lifecycle of the Systems Engineering Technical Review (SETR) process, including design, review, and validation activities. * Conduct and support Assessment and Authorization (A&A) activities under RMF, ensuring systems achieve and maintain Authorization to Operate (ATO). * Manage vulnerability analysis and remediation for critical Navy systems and applications. * Develop and maintain System Security Plans (SSPs), Cybersecurity Strategy and Evaluation (CSSE) documentation, and related artifacts. * Design and evaluate secure network architectures and system boundaries, incorporating cybersecurity technologies such as: * Firewalls, Intrusion Detection/Prevention Systems (IDS/IPS) * Routers, Switches, and Cross-Domain Solutions (CDS) * Host-Based Security Systems (HBSS) * Provide cybersecurity guidance for Platform IT (PIT) systems, supporting both land-based and afloat/tactical environments. * Contribute to cybersecurity test planning, Model-Based Systems Engineering (MBSE) integration, and secure software/hardware development. * Collaborate with multidisciplinary engineering teams and Navy program offices to ensure compliance with DoD cyber and safety standards. * Deliver concise technical presentations and reports to senior leadership and stakeholders. Required Skills/Experience * SLBM Programs: Minimum 7 years of direct experience with Submarine-Launched Ballistic Missile (SLBM) systems; OR * Other Navy Programs: At least 5 years of program-specific security engineering experience with Navy afloat/tactical combat systems (e.g., Aegis, SSDS, Zumwalt); OR * General Experience: 10+ years of general security engineering experience supporting DoD systems. * Minimum 5 years of engineering experience on Aegis, SSDS, Zumwalt, or other Navy tactical combat systems (for at least six senior positions on this contract). * Demonstrated experience in: * Cybersecurity engineering and risk management * DoD/Navy Assessment & Authorization (A&A) * Vulnerability management across complex networked systems * Proven understanding of DoD Cybersecurity policies, RMF, and Platform IT (PIT) implementation. * Experience with the SSP Validator Handbook (for SLBM programs). * Familiarity with combat weapons systems and afloat/tactical environments. * Hands-on experience designing and assessing secure network architectures, cyber boundaries, and defense-in-depth strategies. * Experience with cyber testing, test analysis, and secure computing system development. * Strong written and verbal communication skills with the ability to brief senior leadership. Certifications (Required) * IAT II, IAM II, or higher (e.g., Security+, CASP+, CISSP, or equivalent) * NQV certification (desired, if applicable) Security Clearance * Active Top Secret Clearance required; eligibility for higher-level access may be necessary based on program needs. Data Intelligence, DI is an established small business that has supported the critical missions of our government clients since 2005. We provide full life cycle system development, systems engineering, cybersecurity, and supporting analytical and logistics support to C4ISR and other complex systems. We are an equal opportunity employer that offers competitive salaries, comprehensive benefits, a team-oriented environment, and opportunities for advancement. Our excellent employee retention record reflects our employee focus. We work with Veteran's organization to proactively hire those who have served our country. We offer medical, dental and vision insurance, 401k, PTO and 11 paid holidays. Data Intelligence is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, age, color, religion, creed, sex, sexual orientation, gender identity, national origin, disability, or protected Veteran status.