Cybersecurity Engineer III - Top Secret Clearance | Charleston, SC

Cybersecurity Engineer III – Top Secret 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 Cybersecurity Engineer III to support operations in Charleston, SC. This is a full-time, CONUS position requiring an active DoD Top Secret clearance.

What You’ll Do

As a Cybersecurity Engineer, you will play a critical role in preparing, implementing, and ensuring compliance with cybersecurity policies, including Assessment & Authorization processes such as RMF and ATO frameworks, that serve U.S. government missions at the Cambridge corporate office. You will :

Security Measures Planning & Implementation

Design and deploy security solutions, including firewalls, IDS / IPS, encryption technologies, and multi-factor authentication (MFA).

Implement and manage endpoint, network, and identity security tools to fortify defenses.

Continuous Monitoring & Incident Response

Monitor systems using SIEM and related tools to detect malicious activity and respond swiftly to incidents.

Lead investigations, contain threats, report findings, and restore systems following security breaches.

Vulnerability Assessment & Risk Mitigation

Conduct regular vulnerability scans, penetration tests, and risk assessments.

Propose and implement remediation strategies to address identified weaknesses.

Policy Development & Regulatory Compliance

Develop, document, and enforce security policies and procedures aligned with frameworks such as NIST 800‑53, GDPR, HIPAA, and ISO 27001.

Support assessments, audits, and compliance reviews.

Security Architecture & Collaboration

Work with IT and development teams to embed secure design principles and practices into systems and applications.

Conduct architectural and threat modeling reviews.

Security Testing & Tool Management

Develop and execute test scripts to validate security controls and configurations.

Ensure security tools are functional, compliant, and properly configured.

Threat Intelligence & Ongoing Learning

Stay current with threat trends, emerging vulnerabilities, and advanced defensive technologies.

Incorporate AI and machine learning where appropriate to strengthen threat detection and response capabilities.

Training & Awareness

Educate staff on cybersecurity best practices, phishing awareness, and policy compliance.

Foster a culture of security mindfulness throughout the organization.

W hat You’ll Bring

Required Qualifications :

Education & Experience :

MA / MS + 10 years of relevant experience and

5 years of hands-on experience supporting Navy organization as an NAO Liaison to validate IT / OT systems

Technical Expertise :

Experience preparing, implementing, and ensuring compliance with cybersecurity policy, to include Assessment and Authorization requirements.

Experience may include plan, implement, upgrade, and / or monitor cybersecurity measures to improve cyber defense and maintain a cyber-resilient network; assess cybersecurity vulnerabilities for risks and propose and implement remediation actions or risk mitigation strategies.

Ensure appropriate security controls are in place that will safeguard digital files and electronic infrastructure; and respond to computer security breaches to re-establish protections and make required reports.

Experience in remediation actions or risk mitigation strategies; ensure appropriate security controls are in place that will safeguard digital files and electronic infrastructure; and respond to computer security breaches to re-establish protections and make required reports.

Experience includes leading and mentoring validators and RMF experts with processing A&A and implementing RMF for IT and OT systems.

Strong knowledge of evaluating RMF packages, consulting Echelon III Package Submitting Officer (PSO), preparing command priorities for submission to NAO Team, managing MFR and HRE processes, developing and uploading artifacts to eMASS, and providing NAO guidance.

Certifications :

Information Assurance Management (IAM) or Information Assurance Technical (IAT) or Information Assurance System Architect and Engineer (IASAE) Level I (position-based) per DoD 8570.1M

IAT III

Must have a current and active DoD Top Secret security clearance.

Proficient with modern IT tools and infrastructure technologies

Work Environment

• Compliance with vaccination and medical requirements for TDY / OCONUS roles as per Vaccine Recommendations by AOR | Health.mil .

Office setting :

Primarily an office-based role in Charleston, SC.

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

We believe in investing in our team—both professionally and personally :

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

Join Us

If you're driven by mission, technology, and teamwork—we want to hear from you. Cambridge is growing, and this position is just one of many opportunities on our global team. Know someone perfect for the role? Referrals are welcome—both employees and non-employees may qualify for a bonus.

Apply today and help shape the future of secure cloud computing for national security.

About Cambridge International Systems

At Cambridge, innovation grows through diversity. We are proud to be an equal opportunity employer, committed to creating an inclusive and supportive work environment for all. Learn more at www.cbridgeinc.com .

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