> Markdown version of [/jobs/ext/1425204-isso-security-engineer-ts-sci-with-poly-required](https://www.wearedevelopers.com/jobs/ext/1425204-isso-security-engineer-ts-sci-with-poly-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # ISSO/Security Engineer (TS/SCI with Poly Required) - **Company:** GCI, Inc. - **Location:** Chantilly, VA, United States - **Experience:** Expert - **Salary:** $164,382.0 - $274,518.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, Microsoft Azure, Computer-Aided Audit Tools, Software as a Service, Cloud Computing Security, Configuration Management, Cyber Security, Computer Engineering, Elasticsearch, Infrastructure as a Service (IaaS), Intrusion Detection Systems, Platform as a Service (PAAS), Software Engineering, HP WebInspect, Computer Networking Systems, Information Security Management System, Software Security, Data Analytics, Nessus, Cyber Warfare, Oracle Cloud Infrastructure, Splunk, Vulnerability Analysis - **Published:** July 24, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9055420/issosecurity-engineer-tssci-with-poly-required ## About the Role * Bachelors degree in computer engineering, compute science, cybersecurity, or a similar degree, or 5-8 years of relevant work experience. * 5 years of demonstrated cybersecurity expertise., * Experience assisting the customer with decisions impacting the security posture and compliance of their systems and networks with requirements as documented in NIST 800-53 and its revisions. * Verbal and written communication skills that demonstrate technical cybersecurity concepts in a clear and concise manner. * Support control implementation assessment and reporting and monitoring process using cybersecurity and assessment management systems. * Ability to work both independently and in a team environment., * Demonstrated history of technical aptitude with vulnerability and risk assessment tools * Strong understanding of methodologies for researching and documenting software and hardware vulnerabilities * Demonstrated skill documenting process and procedures in CONOPS, system security, contingency, configuration management and other plans * Knowledge of the customer's organization, network systems, processes and procedures *A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance., Preferred Bachelor of Science or better in Computer Engineering or related field. Experience Required 5 years: Demonstrated cybersecurity expertise. 15 years: Work related experience. ## Description GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry., * Overseeing the security and coordinating risk management by identifying requirements for documentation with system categorization, the System Security Plan (SSP), and systems risk assessment as required under NIST 800-53/53A. * Function as the go-to person for security questions and needs while supporting the customer in-house as well as external stakeholders. * Assessing system compliance with NIST requirements and identifying vulnerabilities in systems and evaluating planned remedial actions based upon those requirements. * Participating in change management by reviewing change requests and assessing the security impact of proposed changes and coordinating those changes with the ISSM. * Work closely with stakeholders, developers, and external teams including customer security managers (ISSMs), organizational leadership, and key personnel to maintain security posture. * Knowledge in assessing security considerations for Artificial Intelligence (AI) solutions, including secure deployment, risk management, data protection, and compliance with enterprise cybersecurity requirements. * Lead comprehensive technical evaluations of cloud-based applications and systems, focusing on secure configurations across PaaS, SaaS, and IaaS environments. * Strong understanding of cloud providers implementing Amazon Web Services (AWS), Microsoft Azure, and Oracle Cloud technologies to implement cloud security best practices. * Utilize audit tools such as Elasticsearch or Splunk SIEMs, and IDS/IPS for monitoring and alerting. * Utilize industry-standard vulnerability assessment tools such as Rapid7, Nessus, and Web Inspect to identify, analyze, and remediate system and application vulnerabilities * Work closely with Common Control Provider (CCP) requirements and methodology. ## Related Videos - [Our journey with Spring Boot in a microservice architecture](https://www.wearedevelopers.com/videos/511-our-journey-with-spring-boot-in-a-microservice-architecture) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) ## Related Articles - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Events like RSAC Get You CISOs. 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