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Senior Linux Systems Administrator Security Clearance

Job in Aurora, Arapahoe County, Colorado, 80012, USA
Listing for: Cornerstone Defense
Full Time position
Listed on 2026-06-12
Job specializations:
  • IT/Tech
    Systems Administrator, Cybersecurity, IT Support
Salary/Wage Range or Industry Benchmark: 125000 - 145000 USD Yearly USD 125000.00 145000.00 YEAR
Job Description & How to Apply Below
Position: Senior Linux Systems Administrator with Security Clearance

Overview

Senior Linux Systems Administrator Aurora, CO Active TS/SCI with Poly Compensation Range: $125,000 - $145,000

Responsibilities
  • Supporting a program in a classified environment as a Linux System Administrator.
  • Responsibilities include building, maintaining, and securing Information Technology systems and directly supporting customer mission-critical capabilities.
  • You will work closely with program developers and system engineers to research issues, determine root causes and implement solutions to system problems.
  • Occasional after hour maintenance and on-call support and must be able to lift up to 35 pounds in support of hardware installations.
  • Occasional travel may be required for installation support. This position is an onsite role.
Qualifications Basic Qualifications
  • Typically requires a Bachelor s degree and a minimum of 5 years of prior relevant experience or a master s degree and minimum of 3 years of prior relevant experience.
  • Active and transferable U.S. government issued TS/SCI with poly security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
  • Must have an active DoD 8570 IAT Level 2 certification (or higher) on start date. IAT Level 2 requires one or more of the following Professional

    Certifications:

    Security+ CE, CCNA Security, GICSP, GSEC, SSCP, CySA+, CND.
  • Experience administering Red Hat Linux based systems with minimal support, to include patching, creating/maintaining RPM packages, performance tuning, networking, user management (LDAP), and security hardening.
Preferred Qualifications
  • Using and developing with automation tools/frameworks such as Terraform, Ansible, and Chef as well as scripting - particularly in Bash and Python
  • Experience administering Windows based systems
  • Experience with pipeline tools such as Jenkins and Artifactory
  • Demonstrated ability to work independently and troubleshoot problems with efficiency
  • Deployment and administration of systems in Amazon Web Services (AWS)
Benefits

Cornerstone Defense offers a comprehensive list of benefits, designed to give employees and their families several options to choose from when selecting benefits that best fit their needs. These offerings include not only a full suite of the traditional Medical/Dental/Vision insurances, but also a number of other benefits and perks to include, but not limited to: a 401(K) plan with a company match, tuition and training assistances, paid vacation/leave, a fitness reimbursement program, college savings plan, commuter benefits, financial advisory services, flex spending accounts, health savings accounts, STD/LTD coverage, life and AD&D insurance, employee assistance programs, life financial planning assistance, and legal resources.

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Position Requirements
10+ Years work experience
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