Information Systems Security Engineer– Top-Secret Clearance|Charleston, SC

Cambridge International Systems; Charleston (SC); On-site; USD 120,000 - 160,000; Full time

Job summary

Cambridge International Systems, Inc. seeks an Information Systems Security Engineer to support NIWC Atlantic in Charleston, SC. This full-time CONUS position requires an active DoD Top-Secret clearance and hands-on RMF implementation across IT and space environments.

You will integrate cybersecurity into system architectures, develop and maintain SSP/POA&M artifacts, and collaborate with engineers, ISSM/ISSO staff, and government stakeholders to ensure compliant, secure systems.

Qualifications

• Experience applying RMF and security controls across lifecycles.
• Knowledge of DIACAP and DoD guidance.
• Experience supporting large defense/space environments.

Responsibilities

• Integrate cybersecurity into system architectures across the lifecycle.
• Engineer, implement, and validate security controls per RMF and DoD guidance.
• Prepare RMF artifacts: SSP, SAP/SAR, POA&M, continuous monitoring.

Skills

RMF knowledge

NIST SP 800-53

System security engineering

Vulnerability assessment

Collaboration with engineers/governm

Education

Bachelor's degree in a relevant field

HS/GED with related experience

Tools

eMASS

ACAS

Job description

Information Systems Security Engineer-- 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 an Information Systems Security Engineer 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 an Information Systems Security Engineer, you will play a critical role in supporting the Naval Information Warfare Center Atlantic (NIWC Atlantic) Expeditionary Enterprise Systems and Services (E2S2) Division. NIWC Atlantic provides design, acquisition, and sustainment services for Marine Corps Systems Command (MCSC) Information Technology (IT) systems). The ISSE is responsible for integrating cybersecurity into system architectures throughout the system lifecycle, ensuring information systems comply with applicable government policies, cybersecurity standards, and Risk Management Framework (RMF) requirements. This role works closely with systems engineers, software developers, architects, ISSM/ISSO personnel, and government stakeholders to engineer secure, resilient solutions that support mission objectives while balancing security, performance, and operational requirements. This role falls under Cyber Security Engineer within our compensation framework. This position reports to Steve Dellinger. You will:

• The ideal candidate will have demonstrated experience supporting large-scale defense or space environments involving space systems, ground infrastructure, mission operations, communications networks, cloud environments, or enterprise information technology capabilities.
• Integrate cybersecurity requirements into system architecture, engineering designs, interface specifications, and technical documentation throughout the system lifecycle.
• Engineer, implement, and validate security controls in accordance with NIST RMF, NIST SP 800-53, CNSSI 1253, DoD guidance, and organizational cybersecurity policies.
• Perform technical security analyses including architecture reviews, vulnerability assessments, threat analysis, risk assessments, attack surface analysis, and mitigation planning.
• Participate in system architecture reviews, engineering design reviews, technical interchange meetings, and configuration control activities to ensure cybersecurity requirements are incorporated early in system development.
• Develop and maintain technical cybersecurity documentation including System Security Plan (SSP) content, control implementation statements, security architecture diagrams, data flow diagrams, network diagrams, interface documentation, and engineering analyses.
• Support development of Security Assessment Plans (SAPs), Security Assessment Reports (SARs), POA&M, continuous monitoring documentation, and other RMF artifacts supporting system authorization.
• Identify cybersecurity gaps, architectural weaknesses, and technical risks, and develop practical engineering solutions to improve the overall security posture.
• Collaborate with systems engineers, software developers, network engineers, cloud engineers, system administrators, and mission partners to establish and maintain secure configuration baselines.
• Evaluate proposed system changes, software releases, technology insertions, and architecture modifications for cybersecurity impacts and accreditation implications.
• Support vulnerability management activities including analysis of vulnerability scan results, prioritization of findings, remediation planning, and validation of corrective actions.
• Participate in integration, testing, verification, validation, and accreditation activities to ensure implemented security controls function as intended.
• Support continuous monitoring activities by assessing control effectiveness, monitoring security posture, and recommending improvements to maintain compliance.
• Ensure secure integration of Commercial Off-the-Shelf (COTS), Government Off-the-Shelf (GOTS), open-source, cloud-based, and custom-designed technologies.
• Provide technical cybersecurity guidance to engineering teams regarding secure system design, defense-in-depth strategies, Zero Trust principles, and cybersecurity best practices.
• Prepare technical reports, engineering recommendations, risk assessments, and executive briefings supporting senior leadership and government decision-makers.
• Plans, develops, and implements proven high-tech solutions to increase security and defend against hacking, malware and ransomware, insider threats, and other types of cybercrimes.
• Oversees monitoring of computer networks, identifies security issues, and anticipates security breaches.
• Executes the installation and maintenance of security programs, plans, and software, including firewalls and data encryption programs.

What You’ll Bring

Required Qualifications:

Must be proficient in using different technologies such as computers and other tools and systems pertinent to the position.

• Education & Experience: Five (5) years with Bachelor's degree or seven (7) years with HS/GED of practical experience demonstrating competency in Cybersecurity, Engineering, Test & Evaluation (T&E) or Assessment & Authorization (A&A)/ Certification & Accreditation (C&A) related field.
• Individual shall demonstrate a working knowledge of the Risk Management Framework (RMF) process and/or include prior experience with the
• Defense Information Assurance & Certification Accreditation Process (DIACAP).
• Individual shall have experience working with Information Assurance tools such as DISA Enterprise Mission Assurance Support Service (eMASS) or Assured Compliance Assessment Solution (ACAS) and may be required to hold an Interim Security Control Assessor qualification.
• Individual shall be familiar with security policies & guidance documents to assist with the preparation and maintenance of process artifacts and traceability documents purposed for compliance with Authority to Operate (ATO) requirements. The specialist shall be capable of evaluating security solutions to ensure they meet security requirements for processing up to classified information, and supervise and/or maintain the operational security posture for an information system or program.
• Individual shall have experience assisting or developing system security policy