Information System Security Officer (ISSO)...

HII Mission Technologies is seeking an Information System Security Officer (ISSO) to support the Joint Integrated Test and Training Center - Nellis (JITTC-N) at Nellis AFB. In this role, you will provide cybersecurity oversight, RMF documentation, system security engineering support, and continuous monitoring for advanced modeling and simulation (M&S) systems-including environments such as the Joint Simulation Environment (JSE), Virtual Air Training System (VATS), and other high-end virtual training architectures supporting USAFWC/ACC mission sets.

You will work as part of an onsite team delivering Advanced Tactics, Training, and Test capabilities across a broad range of simulator and distributed training activities. The ideal candidate brings strong interpersonal skills, deep knowledge of RMF and DoD cybersecurity requirements, and the ability to design, document, and secure complex networked systems.

Your work directly enables the secure operation of cutting-edge simulation environments used to train, test, and prepare warfighters for complex operational missions. By ensuring compliance, mitigating risk, and maintaining a strong cybersecurity posture, you help protect critical systems that shape the future of Air Force tactics and readiness.

Essential Job Responsibilities

• Draft, review, and update RMF artifacts required to obtain and maintain ATO for emerging systems, including advanced M&S environments such as JSE and VATS.

• Support cybersecurity compliance and continuous monitoring for virtual training systems, distributed simulation environments, and related mission systems.

• Evaluate and document security controls for systems supporting high-fidelity simulation, virtual air training, and distributed mission operations.

• Assist in securing network architectures and system configurations used in environments such as VATS, JSE, and other USAFWC/ACC training systems.

• Maintain configuration records for workstations, servers, routers, firewalls, switches, and simulation-related infrastructure.

• Provide cybersecurity guidance to engineering and M&S teams developing or modifying virtual training systems.

• Lead Assessment & Authorization (A&A) processes and support ongoing RMF compliance activities.

• Report cybersecurity incidents to the ISSM through formal reports and briefings.

• Support implementation and enforcement of information system security policies, standards, and methodologies.

• Conduct technical analysis, troubleshooting, and coordination with customers, vendors, and internal teams as required.

• Provide technical training and product briefings to customers and stakeholders.

• 5 years relevant experience with Bachelors in related field; 3 years relevant experience with Masters in related field; 0 years experience with PhD or Juris Doctorate in related field; or High School Diploma or equivalent and 9 years relevant experience.

• Experience using DISA ACAS, ESS, ePO, and Trellix.

• Experience with STIGs, SCAP, SCC, RMF Bodies of Evidence, JSIG, vulnerability scanning, logging tools, LogRhythm, ACAS/NESSUS, and McAfee HBSS.

• Strong understanding of RMF processes and cybersecurity compliance requirements.

• Ability to work in a fast-paced, team-oriented environment with excellent communication and collaboration skills.

Credentials

• DoD 8140 IAT Level II certification (e.g., Security+ CE).

• Compliance with DoD Cyber IT/CSWF Program requirements (DoD 8140.03M, SECNAV M-5239.2).

• Must have held an active Top Secret clearance within the last 24 months.

• Ability to obtain and maintain a TS/SCI and relevant SAP/SAR access.

Preferred Requirements

• Bachelor’s degree in Computer Science, Information Systems, or Information Technology; an advanced degree may substitute for 2 years of experience.

• Strong understanding of RMF, JSIG, and RMF Bodies of Evidence.

• Experience supporting cybersecurity for M&S systems such as VATS, JSE, DMO, or other virtual training environments.

• Experience in cybersecurity, network security architecture, system hardening, auditing/compliance, or systems security engineering.

• Experience supporting cybersecurity compliance under NISPOM/DAAPM, JSIG, ICD 503, STIGs, and NIST publications.

HII is more than a job - it’s an opportunity to build a new future. We offer competitive benefits such as best-in-class medical, dental and vision plan choices; wellness resources; employee assistance programs; Savings Plan Options (401(k)); financial planning tools, life insurance; employee discounts; paid holidays and paid time off; tuition reimbursement; as well as early childhood and post-secondary education scholarships. Bonus/other non-recurrent compensation is occasionally offered for qualified positions, and if applicable to this role will be addressed by the recruiter at the screening phase of application.

As a trusted partner to our military customers, HII designs, develops and operates the largest LVC enterprise that prepares warfighters for cross-domain battle. With advanced technologies to enable mission readiness, HII understands that preparation requires full coordination-not readiness in piece-parts.

For more than 40 years, the U.S. Navy has entrusted HII to maintain and modernize the vast majority of its fleet. With a holistic approach to life-cycle maritime defense systems-from small watercraft to submarines, surface combatants and aircraft carriers-HII ensures a high state of readiness.

HII supports the Department of Energy’s national security mission through the management and operation of its sites, as well as the safe cleanup of legacy waste across the country. HII meets clients’ toughest nuclear and environmental challenges.

Leadership Mindset at HII - Mission Technologies

Leadership at HII is a mindset, not a title. Through our Leadership Capability Framework, we define how every team member contributes to our mission and culture, Our team of more than 7,000 professionals worldwide delivers all-domain expertise and advanced technologies in service of mission partners across the globe. Mission Technologies is leading the next evolution of national defense - the data evolution - by accelerating a breadth of national security solutions for government and commercial customers. Our capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. Find the role that’s right for you. Apply today. We look forward to meeting you., We build the world’s most powerful, survivable naval ships and defense technology solutions that safeguard our seas, sky, land, space and cyber. Our workforce includes skilled tradespeople; artificial intelligence, machine learning (AI/ML) experts; engineers; technologists; scientists; logistics experts; and business administration professionals.

Recognized as one of America’s top large company employers, we are a values and ethics driven organization that puts people’s safety and well-being first. Regardless of your role or where you serve, at HII, you’ll find a supportive and welcoming environment, competitive benefits, and valuable educational and training programs for continual career growth at every stage of your career.

Together we are working to ensure a future where everyone can be free and thrive.