IT Systems Administrator
General Dynamics Mission Systems, Inc · Scottsdale, AZ
$111,881–$124,118from the description
Jul 7, 2026
Scottsdale, AZ
Jul 21, 2026
What this job asks for AI summary
This role sits within an Information Assurance Security team and centers on administering and maintaining the security posture of classified DoD information systems. Day-to-day work covers Risk Management Framework activities, vulnerability scanning and remediation, change control, system audits, and incident response, primarily across RHEL and Windows environments using tools such as SCAP, STIG Viewer, and ACAS/Nessus. A TS/SCI clearance with Polygraph is required from the start.
Mid level · 5+ years · National · TS/SCI 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.
Most people in this occupation already list these. Still required — just not what gets you shortlisted.
What the occupation pays Median $101,310 (middle half $79,725–$129,425). 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 (9)
The role is titled 'IT System Administrator' with no seniority level in the title; advertised seniority is Unspecified.
The JD requires a TS/SCI clearance WITH polygraph at time of hire — the highest clearance gate.
Degree requirement: Bachelor's in a related field OR equivalent experience is accepted, so no hard degree gate is set. The Master's path reduces the experience floor to 3 years, but the baseline is 5 years with a Bachelor's or equivalent.
Total experience minimum is set to 5 years (the Bachelor's/equivalent path), which is the primary stated floor.
ACAS and Nessus are listed together as a single tool reference ('ACAS/Nessus'); ACAS is the DoD-branded deployment of Nessus, so they are treated as alternatives of the same requirement.
DoD 8570 IAM Level I certification (Security+ CE, CAP, or GSLC) and an adjudicated polygraph appear under the 'What sets you apart' section, which functions as a preferred/differentiator block rather than a hard gate.
The SOC classification is Medium confidence: the role blends IT system administration (15-1244) with meaningful Information Assurance / security analysis duties (15-1212). Day-to-day work leans toward operating and maintaining systems under DoD security frameworks, which favors 15-1244.
Ignored 1 non-technology phrase(s) as skills (responsibilities/concepts, not named tools): Windows 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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