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Linux System Admin

Job in Arnold, Jefferson County, Missouri, 63010, USA
Listing for: Apex Systems
Contract position
Listed on 2026-02-06
Job specializations:
  • IT/Tech
    IT Support, Systems Administrator, Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 100000 - 110000 USD Yearly USD 100000.00 110000.00 YEAR
Job Description & How to Apply Below

We see you're coming in from Europe. Are you interested in a position with Apex Systems? Send us your information and resume or call us at our Cork office

Job#: 2072646

Job Description:

Location: Arnold, MO (based out of St. Louis)

Contract Type: 6 months contract to hire

Salary: Up to $100,000 - $110,000 per year (conversion) (Relocation assistance available)

Clearance: TS/SCI

Job Description:

We are seeking a skilled Linux Systems Administrator with expertise in Redhat and Bash scripting to join our team. The ideal candidate will have experience in automation and patching scripts, primarily using Bash, and will be flexible with years of experience, open to candidates with 2-3 years of relevant experience.

To Apply: Email an updated resume to .

Responsibilities:

  • Perform full system upgrades and repairs on Linux and Windows platforms.
  • Troubleshoot and repair operating system (OS) and hardware issues.
  • Conduct daily and weekly system backups and recovery, maintaining logs of system problems, errors, failures, and downtime metrics.
  • Maintain hardware and software inventory lists and install software releases and upgrades.
  • Evaluate and install security patches; create and ensure operation of Active Directory and DNS.
  • Create accounts and set up user-specific access while maintaining group policies and procedures.
  • Acquire system accreditation and ensure personnel comply with system security policies.
  • Submit requirements within Service+ for computer, storage, database, SharePoint, or Tableau infrastructure provisioning to be fulfilled by the UDS contractor.
  • Work on 3D printers, managing vendor-specific requirements.

Qualifications:

  • 2-3 years of related field or work experience.
  • Knowledge of the LINUX operating system, particularly Redhat.
  • Experience with Windows Administration, including:
    • Active Directory
    • Hardening Windows instances per DISA STIG or equivalent
    • Power Shell scripting
    • Local Group Policy Updates/Management
    • Users and Group Management
    • Windows File Shares
  • Knowledge of Amazon Web Services (AWS) or cloud architecture:
    • Amazon EC2 (create and update Amazon Machine Images)
    • Amazon S3 (configure bucket policies, Amazon VPC endpoints)
    • AWS Lambda
    • Amazon Cloud Watch
    • Amazon VPC (manage Security Groups, Subnets, etc.)
    • AWS Identity and Access Management (IAM)
  • Experience with Dalim software (Dalim Twist, Dalim Litho, Dalim ES) is a huge plus.

EEO Employer

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law.

Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at emp or .

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including Clearly Rated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.

Apex Benefits Overview:Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match…

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