Cyber Security Engineer – TS/SCI Clearance | Charleston, SC

cambridgeinternationalsystems; Charleston (SC); On-site; USD 110,000 - 170,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) match

Paid time off

Relocation assistance

Sign-on bonus

Employee referral program

Job summary

Cambridge International Systems, Inc. in Charleston, SC is seeking a Cyber Security Engineer to support DoD programs. This full-time role requires an active TS/SCI clearance and hands-on work defending and securing DoD networks.

You will monitor networks, evaluate risk, and drive RMF/NIST authorization activities while developing policies and security controls. Collaboration with engineers and program staff is essential.

Qualifications

• HS diploma plus 5 years of cyber security experience.
• Experience with RMF processes and artifact development.
• Ability to lead cyber security professionals and provide mentorship.
• Experience with RMF and A&A tools such as eMASS and MCCAST.

Responsibilities

• Monitor security posture and support RMF/NIST authorizations.
• Develop and implement cybersecurity policies, standards, and A&A artifacts.
• Evaluate systems for compliance with DoD information security standards.
• Identify vulnerabilities and coordinate remediation and risk mitigation.
• Lead security testing and validation activities for controls.
• Collaborate with program teams to ensure secure architecture and operations.

Skills

RMF Process

Team leadership

Policy development

Mentorship

A&A knowledge

Education

HS Diploma + 5 years experience

Tools

eMASS

MCCAST

Job description

Cyber Security Engineer – TS/SCI Clearance | Charleston, SC

Cambridge International Systems, Inc.

Join a dynamic global team united by shared values: commitment, integrity, and perseverance. At Cambridge you’ll work alongside top talent worldwide, tackling some of today’s most complex and critical challenges in defense and security.

We are currently seeking a Cyber Security Engineer to support operations in Charleston, SC. This is a full-time, CONUS position requiring an active DoD TS/SCI clearance.

What you’ll do

• Monitor and analyze network traffic, system logs, and security alerts to detect, investigate, and escalate cybersecurity threats and incidents, ensuring timely response and documentation.
• Support integrated cyber defense operations aligned with organizational risk management frameworks; maintain security tools to enable continuous monitoring and RMF/NIST authorization activities.
• Establish and apply methods to quantify and measure cyber risk, supporting risk‑based decision‑making across the enterprise.
• Evaluate business and system architectures to determine cybersecurity requirements and ensure alignment with information security standards and best practices.
• Conduct system security, vulnerability, and risk assessments to identify security gaps, integration challenges, and compliance issues.
• Develop cost estimates and implementation plans for cybersecurity solutions based on risk and compliance assessments.
• Prepare, implement, and enforce cybersecurity policies, standards, and Assessment & Authorization (A&A) requirements.
• Plan, implement, upgrade, and monitor security controls to enhance system resilience and support accreditation processes.
• Identify cybersecurity vulnerabilities, recommend remediation strategies, and track mitigation efforts to closure.
• Respond to and investigate cybersecurity incidents, restore protections, and produce required incident reports in accordance with regulatory guidance.
• Develop and execute security test scripts and validation activities to verify the effectiveness of technical and operational controls.
• Design, develop, and integrate DoD Information Assurance architectures and secure system components within computing, network, and enclave environments.
• Ensure system architectures, including programs of record and special‑purpose processing nodes, meet functional, performance, and security requirements.
• Support secure integration of platform IT and special‑purpose systems with existing infrastructure.
• Develop and deliver cybersecurity training, lead post‑incident reviews, and promote a strong security awareness culture.

What you’ll bring

Required Qualifications

• Education & Experience: HS Diploma + 5 years of relevant experience.
• Technical Expertise: Experience with the RMF Process; experience with policy and RMF artifact development; ability to lead a team of cyber security professionals and direct tasking, provide mentorship and leadership; experience with web‑based applications designed to support the RMF and A&A such as eMASS and MCCAST.
• Certifications: CompTIA CISSP or CASP+ certification; CompTIA CySA+ certification; must have a current and active DoD TS/SCI security clearance; proficiency with modern IT tools and infrastructure technologies.

Preferred (Nice to Have)

• Experience with HBSS.

Travel & Passport

• Up to 25% travel; CONUS and OCONUS may be required.

Work Environment

• Compliance with vaccination and medical requirements for TDY/OCONUS roles as per Vaccine Recommendations by AOR | Health.mil.
• Primarily an office‑based role in Quantico, VA.
• Standard desk/computer work with flexibility for walking and movement on site.
• Must be able to work in an office environment, sitting at a desk, looking at a computer for most of the workday.
• Work is physically comfortable; the employee has discretion about sitting, walking, standing, etc.
• May be required to travel short distances to offices/conference rooms and buildings on site.

Background & Security

• Employment is contingent upon successful background investigation.
• Drug screening may be required for federal contract compliance.

Benefits & Perks

• Medical, dental, vision, life, accident, and critical illness insurance.
• 401(k) immediate vesting and match.
• Paid time off and company holidays.
• Generous tuition & training support.
• Relocation assistance.
• Sign‑on and performance‑based bonuses.
• Employee referral program.
• Access to Tickets at Work, EAP, wellness initiatives, and more.

Equal Opportunity Employer

We are an equal opportunity employer. Applicants and employees are considered for positions and are evaluated without regard to any protected status under applicable law or other similar factors that are not job‑related. We encourage all qualified individuals to apply for employment. Selected applicants may be subject to a background investigation and/or education verification.

We provide reasonable accommodation for qualified individuals with disabilities in accordance with federal, state, and local law. If you require a reasonable accommodation to participate in the application process or to perform the essential functions of the position, please contact our Recruiting Team at [e-mail].