Information Systems Security Engineer (ISSE)

Entarian is seeking an Information Systems Security Engineer (ISSE) to support NIWC Atlantic’s Expeditionary Enterprise Systems and Services (E2S2) Division in Charleston, SC.

Responsibilities

• Integrate cybersecurity requirements into system architecture, engineering designs, interface specifications, and technical documentation across the lifecycle
• Engineer, implement, and validate security controls in alignment with NIST RMF, NIST SP 800-53, CNSSI 1253, and DoD cybersecurity guidance
• Perform architecture reviews, vulnerability assessments, threat analysis, risk assessments, attack surface analysis, and mitigation planning
• Participate in architecture reviews, design reviews, technical interchange meetings, and configuration control boards to build cybersecurity in from the start
• Develop and maintain technical cybersecurity documentation such as SSPs, control implementation statements, security and network diagrams, interface documents, and engineering analyses
• Support RMF activities including SAPs, SARs, POA&Ms, continuous monitoring documentation, and other authorization artifacts
• Identify cybersecurity gaps and architectural risks and recommend engineering solutions to strengthen the security posture
• Collaborate with engineering teams to establish and maintain secure configuration baselines
• Evaluate system changes, technology insertions, and architecture modifications for cybersecurity impact and accreditation implications
• Support vulnerability management by analyzing scan results, prioritizing findings, planning remediation, and validating corrective actions
• Support integration, testing, verification, validation, and accreditation activities to confirm security controls function as intended
• Support continuous monitoring by assessing control effectiveness and recommending improvements
• Ensure secure integration of COTS, GOTS, open-source, cloud-based, and custom-developed technologies
• Provide guidance on secure design, defense-in-depth, Zero Trust principles, and cybersecurity best practices
• Prepare technical reports, engineering recommendations, risk assessments, and executive briefings

Requirements

• Active Top Secret clearance
• Bachelor’s degree (ABET-accredited) in Cybersecurity, Computer, Electrical, or Electronics Engineering, or Mathematics with a concentration in Computer Science; or a related discipline
• Minimum 3 years of experience developing, implementing, and maintaining cybersecurity policies, including Assessment and Authorization (A&A) activities
• DoD 8570/8140 Level I certification in IAM, IAT, or IASAE

Technologies

• NIST RMF, NIST SP 800-53, CNSSI 1253
• ACAS, Nessus, SCAP
• PowerShell, Python, Ansible, Terraform, Kubernetes, IaC
• DoD Enterprise DevSecOps Reference Design, Platform One, DevSecOps
• Zero Trust

Desired Qualifications

• Experience supporting DoD, Intelligence Community, or classified government systems
• Demonstrated experience engineering NIST RMF controls and producing RMF artifacts
• Strong understanding of secure systems engineering, defense-in-depth, Zero Trust architectures, and large-scale distributed systems
• Experience with operating systems, networking, virtualization, cloud, IAM, encryption, and cybersecurity technologies
• Experience conducting vulnerability assessments using ACAS, Nessus, SCAP, or similar tools
• Experience supporting cloud security, hybrid environments, containers, Kubernetes, or DevSecOps pipelines
• Familiarity with IaC and scripting (PowerShell, Python, Ansible, Terraform), and the DoD Enterprise DevSecOps Reference Design or Platform One
• Active security certifications (e.g., Security+, CISSP, CASP+, CCSP, GIAC, or IASAE)
• Strong technical writing and verbal skills to communicate complex cybersecurity concepts to both technical and leadership audiences

Salary

• USD 103,000 - 121,000 per year

Location: Charleston, SC 29404 (onsite)