Senior Network Engineer – Top Secret | North Charleston, SC

Cambridge International Systems Inc•Charleston, SC

4d•$103,000 - $121,000•Onsite

About The Position

Cambridge International Systems, Inc. is seeking an Information Systems Security Engineer to support the Naval Information Warfare Center Atlantic (NIWC Atlantic) Expeditionary Enterprise Systems and Services (E2S2) Division in North Charleston, South Carolina. NIWC Atlantic provides design, acquisition, and sustainment services for Marine Corps Systems Command IT systems. The role requires a current active Top Secret clearance and integrates cybersecurity throughout system architectures and their lifecycle to ensure compliance with government policies, cybersecurity standards, and Risk Management Framework requirements. The ISSE works with engineers, developers, architects, ISSM/ISSO personnel, and government stakeholders to support secure, resilient mission systems. The position includes engineering security controls, assessing and mitigating risks, maintaining security and engineering documentation, supporting system integration and authorization activities, and advising on secure design and cybersecurity practices. Work may take place at government or other secure facilities where personal electronic devices may be restricted. The approximate base salary range is $103,000–$121,000 annually. The final offer depends on relevant experience, skills, internal equity, and market data. Employment is contingent upon a successful background investigation; alcohol and drug screening may be required for federal contract compliance.

Requirements

Bachelor’s degree in Cybersecurity, Computer, Electrical, or Electronics Engineering, or Mathematics with a Computer Science concentration, or a related discipline, from an ABET-accredited degree program.
At least three years of experience developing, implementing, and maintaining cybersecurity policies, including Assessment and Authorization activities.
DoD 8570/8140 Level I certification in IAM, IAT, or IASAE.
Current active Top Secret security clearance.
Ability to perform periods of prolonged sitting and/or standing, including desk-based computer work.
Ability to work at government or other secure facilities where personal electronic devices may be restricted.

Nice To Haves

Experience supporting DoD, Intelligence Community, or classified government systems.
Demonstrated experience engineering NIST RMF controls and preparing RMF artifacts.
Experience with secure systems engineering, defense-in-depth, Zero Trust architecture, and large-scale distributed systems.
Experience with operating systems, networks, virtualization, cloud, identity and access management, encryption, and cybersecurity tools.
Vulnerability assessment experience with ACAS, Nessus, SCAP, or similar tools.
Experience with cloud security, hybrid environments, containers, Kubernetes, and DevSecOps pipelines.
Infrastructure as Code and scripting experience using PowerShell, Python, Ansible, or Terraform; familiarity with DoD Enterprise DevSecOps Reference Design or Platform One.
Active security certifications such as Security+, CISSP, CASP+, CCSP, GIAC, or IASAE.
Strong technical writing and verbal communication skills for technical and leadership audiences.
Experience with large-scale defense, intelligence, or space system environments, including ground infrastructure, mission operations, networks, cloud, or enterprise IT.

Responsibilities

Integrate cybersecurity requirements into system architectures, engineering designs, interface specifications, and technical documentation.
Engineer, implement, and validate security controls in accordance with NIST RMF, NIST SP 800-53, CNSSI 1253, and DoD guidance.
Conduct architecture reviews, vulnerability assessments, threat analysis, risk assessments, attack surface analysis, and mitigation planning.
Participate in design reviews, technical interchange meetings, and configuration control boards to embed security from the outset.
Develop and maintain SSPs, control implementation statements, security and network diagrams, interface documents, and engineering analyses.
Support RMF artifacts, including SAPs, SARs, POA&Ms, and continuous monitoring documentation.
Identify security gaps and architectural risks and recommend practical engineering mitigations.
Collaborate with engineering teams to establish and maintain secure configuration baselines.
Evaluate system changes, technology insertions, and architecture modifications for cybersecurity and authorization impacts.
Analyze vulnerability scan results, prioritize findings, plan remediation, and validate corrective actions.
Support integration, testing, verification, validation, accreditation, and continuous monitoring activities.
Ensure secure integration of COTS, GOTS, open-source, cloud-based, and custom-developed technologies.
Provide guidance on secure design, defense-in-depth, Zero Trust, and cybersecurity best practices.
Prepare technical reports, engineering recommendations, risk assessments, and executive briefings.
Communicate with team members, customers, and stakeholders in writing and verbally.
Manage competing priorities and deadlines while maintaining attention to detail.