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When you join the Cambridge team, you are part of a skilled and talented global community that is united by a set of core values: commitment, integrity, and perseverance. Join our team and help us confront today’s most threatening and complex obstacles!

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WORK-LIFE BALANCE
We understand you have commitments outside of the office. We provide a flexible paid time off package and 11 paid holidays per year.

RETIREMENT SUPPORT
We provide competitive 401(K) options including contribution matching that is 100% vested.

TRAINING AND EDUCATION ASSISTANCE
We offer reimbursement for continuing education and training.

PROFESSIONAL DEVELOPMENT

We support your professional growth and development through conference attendance, mentor programs, and internal training.

BONUSES
We recognize the importance of involving you in the hiring process, so we offer a generous employee referral bonus program. We also show our appreciation for your hard work through performance-based bonuses and on the spot bonuses that recognize outstanding achievements.

HEALTH INSURANCE
We offer full-time employees competitive medical, dental, vision, life, and disability insurance plans.

OTHER PERKS
We value the health and wellness of our employees by providing a comprehensive wellness program, community involvement and outreach opportunities, employee assistance program (EAP) and Tickets at Work accounts!

At Cambridge, we recognize innovation and agility grow through diverse collaboration. Our team is comprised of unique individuals, and it is our policy to provide equal opportunity in recruiting, hiring, training, and promoting individuals in all job categories without regard to race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), parental status, national origin, age, disability, genetic information (including family medical history), political affiliation, military service, or any other protected class or category as may be defined by federal, state, or local laws or regulations. It is our firm intent to support equal employment opportunity and affirmative action in keeping with applicable federal, state, and local laws and regulations.

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For more information on equal opportunity protections, please view the U.S. Department of Labor’s Office of Federal Contract Compliance Programs EEO is the Law poster and the EEO is the Law Supplement on our Careers page.

Senior Network Engineer – Top Secret | North Charleston, SC

Charleston, SC

Full Time

Mid Level

Information Systems Security Engineer (ISSE) – Top Secret | North 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 an Information Systems Security Engineer (ISSE) to support the Naval Information Warfare Center Atlantic (NIWC Atlantic) Expeditionary Enterprise Systems and Services (E2S2) Division in North Charleston, SC. NIWC Atlantic provides design, acquisition, and sustainment services for Marine Corps Systems Command (MCSC) IT systems. This position requires an active Top Secret clearance.

The base salary range for this role is approximately $103,000–$121,000 annually. The final offer will be based on relevant experience, skills, internal equity, and market data.

What You’ll Do
As an ISSE, you will integrate cybersecurity into system architectures throughout the lifecycle, ensuring compliance with government policies, cybersecurity standards, and Risk Management Framework (RMF) requirements. You will partner with engineers, developers, architects, ISSM/ISSO personnel, and government stakeholders to support secure and resilient mission systems. You will:
• Integrate cybersecurity requirements into system architectures, engineering designs, interface specifications, and technical documentation.
• Engineer, implement, and validate security controls in accordance with NIST RMF, NIST SP 800-53, CNSSI 1253, and DoD guidance.
• Conduct architecture reviews, vulnerability assessments, threat analysis, risk assessments, attack surface analysis, and mitigation planning.
• Participate in design reviews, technical interchange meetings, and configuration control boards to embed security from the outset.
• Develop and maintain SSPs, control implementation statements, security and network diagrams, interface documents, and engineering analyses.
• Support RMF artifacts, including SAPs, SARs, POA&Ms, and continuous monitoring documentation.
• Identify security gaps and architectural risks and recommend practical engineering mitigations.
• Collaborate with engineering teams to establish and maintain secure configuration baselines.
• Evaluate system changes, technology insertions, and architecture modifications for cybersecurity and authorization impacts.
• Analyze vulnerability scan results, prioritize findings, plan remediation, and validate corrective actions.
• Support integration, testing, verification, validation, accreditation, and continuous monitoring activities.
• Ensure secure integration of COTS, GOTS, open-source, cloud-based, and custom-developed technologies.
• Provide guidance on secure design, defense-in-depth, Zero Trust, and cybersecurity best practices.
• Prepare technical reports, engineering recommendations, risk assessments, and executive briefings.

What You’ll Bring
Required Qualifications:
• Education: Bachelor’s degree in Cybersecurity, Computer, Electrical, or Electronics Engineering, or Mathematics with a Computer Science concentration, or related discipline, from an ABET-accredited degree program.
• Experience: At least three (3) years developing, implementing, and maintaining cybersecurity policies, including Assessment and Authorization (A&A) activities.
• Certification: DoD 8570/8140 Level I certification in IAM, IAT, or IASAE.
• Clearance: Current active Top Secret security clearance.

Preferred (Nice to Have):
• Experience supporting DoD, Intelligence Community, or classified government systems.
• Demonstrated experience engineering NIST RMF controls and preparing RMF artifacts.
• Secure systems engineering, defense-in-depth, Zero Trust architecture, and large-scale distributed systems.
• Experience with operating systems, networks, virtualization, cloud, identity and access management, encryption, and cybersecurity tools.
• Vulnerability assessment experience with ACAS, Nessus, SCAP, or similar tools.
• Cloud security, hybrid environments, containers, Kubernetes, and DevSecOps pipelines.
• Infrastructure as Code and scripting using PowerShell, Python, Ansible, or Terraform; familiarity with DoD Enterprise DevSecOps Reference Design or Platform One.
• Active security certifications such as Security+, CISSP, CASP+, CCSP, GIAC, or IASAE.
• Strong technical writing and verbal communication skills for technical and leadership audiences.
• Experience with large-scale defense, intelligence, or space system environments, including ground infrastructure, mission operations, networks, cloud, or enterprise IT.

Physical & Work Environment Requirements
• Periods of prolonged sitting and/or standing, including desk-based computer work.
• Work at government or other secure facilities where personal electronic devices may be restricted.
• Communicate with team members, customers, and stakeholders in writing and verbally.
• Manage competing priorities and deadlines while maintaining attention to detail.

Background & Security
• Employment is contingent upon successful background investigation.
• Alcohol and 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
• Tuition and training support
• Employee referral program
• Access to Tickets at Work, employee assistance program (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 one of many opportunities on our global team. Apply today and help advance secure systems supporting national security.

About Cambridge International Systems
At Cambridge, we believe innovation and agility thrive when people work together. Our culture is built on teamwork, collaboration, and a commitment to listening, learning, and bringing out the best ideas in every employee. We empower our people to take on challenges, persevere to get the job done, and lead with integrity.
Our commitment to our employees and workplace culture has been recognized through the DAV Patriot Small Employer of the Year Award in 2026 and the Cigna Healthy Workforce Gold Designation in 2025. Learn more at www.cbridgeinc.com.

We are an equal opportunity employer. Applicants and employees are considered without regard to protected status under applicable law or other factors unrelated to the job. We encourage all qualified individuals to apply. Selected applicants may be subject to background investigation and/or education verification.

We provide reasonable accommodation for qualified individuals with disabilities in accordance with applicable law. For accommodations during the application process or to perform essential functions, contact [email protected].

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