Cybersecurity Engineer III

Nationwide IT Services•North Charleston, SC

5d•$100,000 - $175,000•Onsite

About The Position

Nationwide IT Services (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.

Requirements

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

Nice To Haves

Active DoD Secret clearance or higher.
Hands-on RMF experience.
Experience implementing and validating DISA STIGs.
Experience with ACAS, SCAP, eMASS, or HBSS.
Experience supporting NAVWAR or other Navy programs.

Responsibilities

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.