Sr Systems Security Engineer / Sr. Core Applications Administrator
On-siteLone Tree, Colorado, United States
Job Summary
Senior Systems Security Engineer to lead the design and implementation of security infrastructure across Linux/RHEL environments and enterprise DevSecOps tooling. The role includes managing backend and frontend application servers (Tomcat/JBoss, Apache/Nginx), configuration baselines, patch/update cycles, monitoring, license compliance, and security hardening (DISA STIG). You will administer RHEL/CentOS/Rocky Linux systems, implement access controls (Kerberos, PAM, SSSD), and manage integration with CI/CD pipelines and artifact repositories (Artifactory). The position requires hands-on experience with GitLab/GitHub administration, Artifactory, and multiple engineering applications (3DEXPERIENCE, Cameo, Jama Connect, Teamcenter), plus strong scripting and automation skills. A current Top Secret clearance is required, with a focus on delivering secure, compliant, and resilient engineering platforms across programmatic workloads.
Required Qualifications
- Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline
- 8+ years of experience in IT security or related field
- Experience with security frameworks and standards such as NIST, ISO 27001
- 5+ years of hands-on application administration experience in Linux/RHEL environments
- Experience administering GitLab and/or GitHub at organizational/enterprise scale
- Experience administering JFrog Artifactory
- Hands-on experience with two or more of: 3DEXPERIENCE, Cameo Systems Modeler/Teamwork Cloud, Jama Connect, Siemens Teamcenter
- Proficient Linux/RHEL system administration (RPM/YUM/DNF, systemd, scripting)
- Experience troubleshooting multi-application integration failures (API, authentication, data sync)
- Understanding of SSL/TLS certificate management, firewall rules, and application security
- Active Top Secret U.S. Security Clearance
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