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# Cybersecurity Engineer III

- **Company:** Nationwide IT Service, Inc.
- **Location:** Charleston, SC, United States
- **Experience:** Experienced
- **Salary:** $100,000.0 - $175,000.0
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Computer Engineering, Desktop Computing, Identity and Access Management, Information Systems Security Architecture Professional, Security Content Automation Protocol, Data Streaming, C4i, Information Technology
- **Published:** August 6, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9079722/cybersecurity-engineer-iii

## About the Role

Education: Bachelor's degree in Cybersecurity, Computer Engineering, Electrical Engineering, Electronics Engineering, Mathematics with a concentration in Computer Science, or equivalent.
Certification: Current DoD 8570/8140-compliant certification meeting IAM Level II, IAT Level II, or IASAE Level II requirements.
Experience: Minimum of 10 years of professional cybersecurity engineering experience.
DoD C4I Experience: At least 4 years supporting DoD C4I systems., * Hands-on RMF experience.

 * Experience implementing and validating DISA STIGs.
 * Experience with ACAS, SCAP, eMASS, or HBSS.
 * Experience supporting NAVWAR or other Navy programs.

## Description

NIS is seeking an experienced Cybersecurity Engineer III to serve as Key Personnel supporting a Department of Defense Command, Control, Communications, Computers, and Intelligence (C4I) program. This senior-level engineer will provide cybersecurity engineering across the system lifecycle, translating mission and security requirements into secure architecture, RMF evidence, hardening decisions, remediation plans, and authorization-ready artifacts. Success requires strong technical judgment, disciplined documentation, and effective collaboration with government and contractor teams., * Design, implement, and maintain secure system architectures for mission-critical C4I environments.

 * Perform cybersecurity engineering across planning, design, development, integration, testing, deployment, operations, and sustainment activities.
 * Support Risk Management Framework (RMF) activities, including control implementation, assessment support, authorization evidence, and continuous monitoring.
 * Analyze security requirements, system interfaces, data flows, and proposed changes to identify risk and recommend practical mitigations.
 * Conduct or support security assessments, review vulnerability findings, prioritize remediation, and verify corrective actions.
 * Apply and validate secure configuration guidance, including applicable DISA Security Technical Implementation Guides (STIGs).
 * Develop and maintain cybersecurity artifacts, including security plans, control narratives, risk assessments, diagrams, test evidence, and Plans of Action and Milestones (POA&Ms).
 * Support technical reviews, configuration and change control, security testing, authorization milestones, and clear communication of risks and recommended actions.


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