Sr Systems Security Engineer at Sierra Nevada Company, LLC
Lone Tree, CO
$143,487–$197,295from the description
Jun 30, 2026
Lone Tree, CO
Jul 21, 2026
What this job asks for AI summary
A senior-level role focused on administering and securing a broad stack of engineering and DevSecOps platforms — including RHEL/Linux systems, GitLab, JFrog Artifactory, Dassault 3DEXPERIENCE, Cameo Systems Modeler, and Jama Connect — within a classified defense program. Day-to-day work spans application lifecycle management, DISA STIG hardening, cross-tool integration troubleshooting, and ATO/RMF compliance support. An active Top Secret clearance is required.
Senior level · 8+ years · National · TS/SCI clearance · Full-time
“or” means any one of them counts — you don't need all of them.
We read this from the posting text with AI. Skim the description below before ruling yourself out.
How this req sits in the market our data
Rare in this occupation — lead with these, and say what you built with them.
Most people in this occupation already list these. Still required — just not what gets you shortlisted.
What the occupation pays Median $132,021 (middle half $99,961–$167,095). This posting is about at that midpoint.
Estimated from BLS employment for this occupation and area, per-skill prevalence across our listing corpus, and published wage benchmarks — as of Jul 28, 2026. It is a model, not a headcount.
Why we read it this way (10)
The job location is not specified in the posting — it is associated with SNC's ISR/Aviation/Security business area and the SAOC program, which is typically based in the Denver, CO area or other SNC facilities, but no city is stated. CBSA left blank.
The role title is 'Senior Systems Security Engineer' but the day-to-day work is overwhelmingly application and Linux systems administration (GitLab, Artifactory, RHEL, 3DX, Cameo, Jama) with security compliance (STIG/RMF/ATO) woven throughout. SOC 15-1212 (Information Security Analysts) was chosen because security hardening, STIG compliance, ATO/RMF package development, and cybersecurity principles are explicitly required and central; 15-1244 (Network and Computer Systems Administrators) is a strong runner-up given the depth of platform and Linux administration duties.
The clearance requirement is stated as 'Top Secret with SCI eligibility' — classified as TopSecretSci.
Degree requirement: a Bachelor's is listed as required, but the JD explicitly states 'Relevant experience can be considered as a substitute for the required educational qualifications. In the absence of a degree, a minimum of 12 years of related experience is required.' This equivalent-experience substitution means the degree is not a hard gate, so the degree requirement is set to None.
The '8+ years' overall experience requirement is the role-level gate; the '5+ years' Linux/RHEL requirement is captured on that skill's years demanded.
The requirement to administer 'at least two of the following: 3DX, Cameo, Jama, or Teamcenter' is captured as a single skill with alternatives, reflecting that any two of the four satisfy the gate — the specific pairing is left to the candidate.
Certifications (RHCSA, RHCE, GitLab Certified Associate, JFrog Certified Professional) appear under 'Qualifications We Prefer' and are marked preferred accordingly.
Containerization (Docker/Kubernetes/OpenShift), JFrog Xray, Python/Ansible scripting, SAML/SSO, and Cameo TWC at scale all appear under 'Qualifications We Prefer' and are marked preferred.
Ignored 1 non-technology phrase(s) as skills (responsibilities/concepts, not named tools): Linux system administration.
Requires a TS/SCI clearance — the cleared population is a small fraction of this occupation, so the real candidate pool is materially smaller than the estimate below, which does not model clearance.
Read the full posting
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