Senior Systems Engineer - Clearance Required
Lockheed Martin · Littleton, CO
$85,500–$150,765from the description
Jul 7, 2026
Littleton, CO
Jul 21, 2026
What this job asks for AI summary
A systems integration and test engineering role focused on Cross Domain Solutions at operational sites. Day-to-day work involves executing hardware and software tests, developing and maintaining test documentation, troubleshooting anomalies, and resolving interface issues across the full integration lifecycle from factory acceptance through customer site delivery. Suited to candidates with hands-on RHEL Linux and Solaris administration experience and an active Top Secret clearance.
Senior level · Denver-Aurora-Lakewood, CO · Top Secret clearance · Full-time
“or” means any one of them counts — you don't need all of them.
Posted 2 times — it's one opening, so apply once.
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.
What the occupation pays Median $126,410 (middle half $97,907–$144,029). 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 (8)
The role blends systems integration, test execution, and system administration — it sits between 15-1253 (QA/Test) and 15-1211 (Systems Analyst); test artifact development and test execution are the primary deliverables, so 15-1253 was chosen with 15-1211 as the runner-up.
The clearance gate is stated as 'Current/Active DoD Top Secret Security Clearance investigation within 5 years from investigation close date'; TS/SCI is not explicitly required — only Top Secret is listed, so TopSecret (not TopSecretSci) was applied. SAP access is required but is a program-access adjudication, not a formal clearance tier.
DoD 8140 certification is listed as a hard requirement; Security+ is given as an example ('e.g., Security+') of a qualifying cert under that framework — it is treated as a representative must-have cert rather than the only acceptable one.
RHEL and Solaris are listed together as required system administration platforms; both are captured as required with each as an alternative for the other, reflecting that hands-on expertise on either platform satisfies the stated requirement.
Cross Domain Solutions (TMAN, Radiant Mercury), Cisco networking, STIG compliance, and test automation tools (Eggplant, TWIN) all appear under the 'Desired Skills' heading and are marked preferred accordingly.
The salary range quoted ($85,500–$150,765) applies specifically to Colorado (among other named states); the posting notes the range may differ for other locations.
No minimum total years of experience is explicitly stated at the role level; the posting uses 'Experienced Professional' as a career-area label but does not attach a year count.
Requires a Top Secret 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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