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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Security Engineer III - **Company:** Sierra Nevada Corporation. - **Location:** Southern Pines, NC, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Xacta, Software Applications, Cyber Security, Information Systems, Computer Networks, Digital Forensics, Information Systems Security Engineering Professional, Software Vulnerability Management, Information Security Management System, Delivery Pipeline, Software Security, Kubernetes, Information Technology, Tenable Nessus, Scap Compliance Checker, Devsecops, Static Application Security Testing, Dynamic Application Security Testing - **Published:** August 27, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9121204/systems-security-engineer-iii ## About the Role * Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline * 5+ years of experience in IT security or a related field. * Relevant experience can be considered as a substitute for the required educational qualifications. In the absence of a degree, a minimum of 9 years of related experience is required. * Higher level relevant degree may substitute for experience. * Must have IAT Level III certification (CISSP, CASP, GCIH, etc.) or ability to attain within 6 months of hire. * Demonstrated experience working in an application security environment and performing application security related tasks such as SAST/DAST/SCA testing. * Demonstrated experience with security control assessment tools such as ACAS / Tenable Nessus, SCAP Compliance Checker, Static Application Security Testing tools and Dynamic Application Security Testing tools. * Strong understanding of DoD applicable Security Technical Implementation Guides (STIGs), NIST special publications, and NSA Guides. * Working knowledge of operating systems and networking concepts. * Demonstrated ability to effectively communicate, complete tasks and assignments on time, problem solve, work in a team environment, and work independently when necessary. Qualifications We Prefer: * Experience implementing DevSecOps processes within existing DevOps pipelines. * Experience configuring, deploying, and securing applications within the modern Kubernetes / CNCF landscape. * Experience working with the RMF accreditation process for a Department of Defense customer. * Experience working with deployed tactical information systems. * Additional information security industry certifications such as the CISSP-ISSEP, CISM, or C|EH Certification Essential Functions: * Ability to work primarily at a computer for extended periods. * Capability to participate in on-call rotation for incident response. * Must be able to lift up to 25 lbs occasionally. * Ability to work in an office or hybrid environment. * Occasional travel may be required. ## Description Are you looking for an opportunity to deepen your IT skills in a meaningful work environment that supports and protects explorers and heroes? Join our team! As a Systems Security Engineer III, you will play a pivotal role in ensuring the security of our IT infrastructure. You will lead the design, implementation, and maintenance of secure IT systems, and take charge of high-level incident response and digital forensics., The Mission Solutions and Technologies (MST) business area provides affordable, turn-key command/control, communications, integrated ISR, force protection and security solutions worldwide. The MST team has a long legacy of supporting the Department of Defense, Department of Homeland Security, commercial and international customers with years of experience in platform operations, engineering and full lifecycle management across domains - air, land, sea, space and cyber., * Participate in high-quality interaction with customers, team members, contractors, and ultimately the government authorization official to achieve the directed Information Systems Security objectives. * Serve as a subject matter expert in the field of Information Systems Security and provide guidance during the design, integration, or upgrade of software applications and information systems. * Combined knowledge of Information Systems Security policies and operational understanding to develop or review Assessment & Authorization documentation based upon the NIST Risk Management Framework and other U.S. Department of Defense regulations. * Perform random and scheduled security control assessments of software applications and information systems to ensure compliance with requirements based upon NIST Risk Management Framework and other U.S. military regulations. * Participate in continuous monitoring activities such as vulnerability management, incident response, and accreditation record maintenance in systems such as eMASS or XACTA. * Perform work product evaluation of other Information Systems Security team members during the design, integration, or upgrade of new or existing information systems. ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [DevSecOps: Injecting Security into Mobile CI/CD Pipelines](https://www.wearedevelopers.com/videos/273-devsecops-injecting-security-into-mobile-ci-cd-pipelines) - [Understanding Kubernetes in a visual way](https://www.wearedevelopers.com/videos/100085-understanding-kubernetes-in-a-visual-way) - [DevSecOps culture](https://www.wearedevelopers.com/videos/783-devsecops-culture) - [You can’t hack what you can’t see](https://www.wearedevelopers.com/videos/41-you-can-t-hack-what-you-can-t-see) - [DevSecOps: Security in DevOps](https://www.wearedevelopers.com/videos/36-devsecops-security-in-devops) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Events like RSAC Get You CISOs. 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