Cybersecurity Engineer III

Cybersecurity Engineer III
Place of Performance: Charleston, South Carolina | Department of Defense C4I Program
Clearance: TS/SCI eligible

About Nationwide IT Services
Nationwide IT Services (NIS) is a mission-driven IT and management consulting company serving government customers. Founded in 2006, NIS delivers cybersecurity, enterprise IT, cloud, digital services, DevSecOps, AI, data analytics, and mission support solutions. NIS is a Service-Disabled Veteran-Owned Small Business committed to innovative, value-added solutions delivered with integrity and a people-first culture that invests in professional growth and service.

Position Summary
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.

Key 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.

Minimum Qualifications
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.

Preferred Qualifications
Hands-on RMF experience.
Experience implementing and validating DISA STIGs.
Experience with ACAS, SCAP, eMASS, or HBSS.
Experience supporting NAVWAR or other Navy programs.

Why Join NIS?
Join a trusted government contractor supporting high-impact defense missions alongside experienced professionals in a collaborative, growth-focused environment. NIS invests in professional development, recognition, and opportunities to contribute to work that matters.

Benefits
For eligible employees, NIS offers medical, dental, and vision insurance; life and disability insurance; a 401(k) plan with employer match; paid holidays; paid time off; commuter benefits; an employee assistance program; educational reimbursement; and pet insurance. Eligibility and offerings may vary based on employment classification and plan terms.

Salary range $100,000 to $175,000 annually 
The salary range is a general guideline. We consider several factors when determining base salary offers, including the position's scope and responsibilities, the candidate's experience, education, and skills, and current market conditions.