NMCC ISSE/Cybersecurity Engineer

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Job Summary:

JCS Solutions has a need for an Information System Security Engineer (ISSE)/Cybersecurity Engineer to join our growing team providing support services at the National Military Control Center (NMCC) at the Pentagon, Arlington, VA. This position maintains and enhances the security posture of the NMCC environment. This technical role is critical for the health and performance of our security infrastructure, requiring expertise in system administration, security tool management, and system hardening This position offers an excellent opportunity to be part of a high-performing team responsible for supporting a high-velocity collaborative environment, along with tremendous growth potential. If you are interested in a challenge and a great working environment, apply today!

What’s in it for you:

• Join a premier technology firm specializing in innovative solutions.
• Be part of a collaborative, inclusive, and innovative work culture.
• Enjoy tremendous growth potential in a high-performing team environment.
• A robust benefits package:
  • Health, dental, and vision insurance
  • Life insurance
  • Short-and-long term disability
  • Paid time off (PTO)
  • 401k retirement plan with employer match
  • Annual Professional Development Reimbursement Program
  • And more!

What you will do:
The specific duties include but are not necessarily limited to the following:

• Security Tool Infrastructure Management:
  • Primary responsibility for the backend infrastructure, deployment, patching, tuning, and overall health of security tools, including Tenable Nessus, Trellix ePO (HBSS/ESS), and associated Windows and Red Hat Linux servers.
  • Deep understanding of Windows and Linux operating systems, networking protocols, and security best practices.
  • Proactively monitor system performance, identify bottlenecks, and implement solutions to ensure optimal operation of security tools.
  • Develop and maintain standard operating procedures (SOPs) for security tool administration.
• Vulnerability Management & System Hardening:
  • Conduct technical security assessments of computing environments to identify points of vulnerability and recommend mitigation strategies.
  • Implement Security Technical Implementation Guides (STIGs) on Windows and Red Hat Linux systems.
  • Develop and implement security designs for new and existing network systems, ensuring hardware, operating systems, and software applications adequately address cybersecurity requirements.
• Remediation & Continuous Monitoring:
  • Develop and implement approaches to mitigate IS and Network Environment vulnerabilities, recommending changes to network or network system components as needed.
• Security Architecture & Integration:
  • Build IA into systems deployed to operational environments, validating and verifying system security requirements, and establishing system security designs for stand-alone systems. Support security planning, assessment, risk analysis, and risk management.
• Security Tool Troubleshooting & Support:
  • Provide Tier 3 troubleshooting support for cybersecurity tools such as ACAS and HBSS/ESS.
• RMF Support & Documentation:
  • Support the documentation of security control implementations and gathering of artifacts to support Risk Management Framework (RMF) and ICD 503 Security Accreditation.
  • Assist with RMF related tasks as needed
• Excellent communication and collaboration skills are a must.

What you will bring:

• Active security clearance- Top Secret-SCI
• Current DoD 8570 baseline certification for IAT II (one of the following: GSEC, Security+, SCNP and SSCP certifications)
• Bachelor Degree or equivalent work experience and certifications
  • Education and experience requirements may be substituted with:
    • A master’s degree (in subjects described above) and 3 years of experience.
• 5+ years of hands-on experience administering and maintaining Tenable Nessus, Trellix ePO (HBSS/ESS), and related security tools in a production environment.
• Proven ability to implement and validate STIGs on Windows and Red Hat Linux systems.
• Expertise in troubleshooting and resolving issues related to Nessus, ePO, and associated infrastructure components.
• Deep understanding of Windows and Linux operating systems, networking protocols, and security best practices.
• 5+ years of experience in systems engineering, including design and architecture.
• Demonstrated capability to identify security risks throughout information system network structures to include the Operating Systems, hardware, and various data transfer protocols.
• Effective communication and presentation skills.
• Strong planning, organizational, and time management skills.
• Demonstrated initiative and ability to work independently.
• A deep understanding of operating systems, security tools, and server infrastructure is essential.

How you will wow us:

• Ability to Run Evaluate-STIG scans on Windows and RHEL servers, as well as network devices
• Knowledge of the process of obtaining licenses for all HBSS ePO’s and Tenable Security Centers.
• Thorough understanding of Information Security principles and Risk Assessment techniques.
• Working knowledge of the Air Force and/or DoD is a plus.

JCS Solutions LLC (JCS) is a premier technology firm specializing in enterprise-wide capabilities including cloud and infrastructure solutions, cyber security, digital modernization, next generation technologies enablement, software solutions, and mission support services dedicated to providing the highest quality of services and solutions. JCS delivers expert management consulting and information technology (IT) solutions to federal agencies.

We are a learning organization that promotes a work culture of collaboration, inclusiveness, inspiration and innovation.

JCS has been certified as a Great Place to Work four years in a row and was awarded as Washington Post’s Top Places to Work for 2024 and 2025 .

Our employees embody our core values, and we are looking for others who do too!

• Customer Experience: Strive for excellence and delight our clients
• Innovation: Embrace creative thinking to enable continual growth and powerful solutions
• Accountability: Take ownership of and pride in our actions and service delivery
• Inspire: Be inspired to be your best self and have fun in the process
• Integrity: Do the right thing, the right way, every time!
• Stewardship: Careful management of something entrusted to us.

Commitment to Non-Discrimination:
All qualified applicants will receive consideration for employment without regard to any status protected by applicable federal, state, or local laws.