HII Mission Technologies is seeking a highly skilled Cyber Security Analyst IV to provide technical cybersecurity support to the Navy Enterprise Tactical Training Network (NETTN) with a focus on ACAS data analysis. This role has a direct impact on safeguarding Navy training systems by identifying vulnerabilities, strengthening defenses, and ensuring compliance with DoD cybersecurity standards. You will serve as a subject matter expert, advising government stakeholders and supporting mission readiness through proactive risk management. 100% onsite Flexibility required to work non‑standard hours and weeks exceeding 40 hours to meet mission and contractual requirements. Duties may be adjusted to meet evolving business and customer needs.