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Linux System Administrator with Security Clearance

Job in Bethesda, Montgomery County, Maryland, 20811, USA
Listing for: TENAX Technologies, LLC
Full Time position
Listed on 2026-08-05
Job specializations:
  • IT/Tech
    Systems Administrator, IT Support, Cybersecurity, Unix/Linux
Salary/Wage Range or Industry Benchmark: 50000 USD Yearly USD 50000.00 YEAR
Job Description & How to Apply Below

TENAX Technologies is currently seeking a Linux System Administrator to provide technical support at Aberdeen Proving Ground. The Linux System Administrator will provide high-level service to end-users while troubleshooting advanced hardware, software, and network issues for the Army Research Lab, which operates 24/7/365. The ideal candidate must possess excellent customer service skills and the ability to effectively communicate technical information to non-technical users.

Key Responsibilities
  • Proactively maintain and develop all Linux infrastructure technology to maintain a 24x7x365 uptime service at the Service Desk.
  • Manage, coordinate, and implement software upgrades, patches on workstations.
  • Integrate new hardware and software into existing infrastructure.
  • Collaborate with other teams and team members to develop automation strategies and deployment processes.
  • Develop, implement and maintain security controls and supporting documentation as required for risk management framework (RMF).
  • Fault finding, analysis and of logging information for reporting of performance exceptions.
  • Support security incident reporting, vulnerability assessments, and information assurance compliance scans.
  • Maintain system evaluations and certifications.
  • Facilitate the creation and maintenance of Identity and Device Management
  • Provide platform administration for Linux based applications.
  • Provide input on ways to improve the stability, security, efficiency, and scalability of the environment.
  • Maintain best practices on managing systems and services across all environments.
Requirements
  • Associate or bachelor’s degree in a related field, or two years of general IT experience.
  • Minimum of 1-2 years of experience in a technical support role, preferably in a helpdesk or service desk environment, with at least 1 year of experience with Linux.
  • CompTIA Security+ or other IAT level II certification.
  • Linux+, RHCSA, LPIC or equivalent Linux computing certificate is required.
  • Demonstrated knowledge of Linux:
    Red Hat, CentOS, Debian, etc.
  • Solid knowledge of protocols such as DNS, HTTP, LDAP, SMTP and SNMP
  • Experience acquiring and installing software from different sources (ie: vendor tar files, repos)
  • Identity and Device Management (ie: Active Directory, Kerberos, PAM, SSSD)
  • Experience using Windows operating systems, Microsoft Office, and other productivity software.
  • Knowledge of networking concepts (ie: VLANs & IPV6) and troubleshooting techniques.
  • Strong customer service skills and ability to communicate technical information to non-technical users.
  • Ability to work independently and in a team environment.
  • Strong problem-solving skills.
  • Nice to have Familiarity with general virtualization concepts. Experience with Nutanix is preferred.
  • Understanding of SElinux
  • Experience using Ansible or Puppet
  • Experience using Red Hat Satellite
Job Details
  • Job Type: Full-time Pay: $50,000.00 - $ per year Benefits: 401(k)
  • 401(k) matching
  • Dental insurance
  • Health insurance
  • Health savings account
  • Paid time off
  • Parental leave
  • Professional development assistance
  • Referral program
  • Tuition reimbursement
  • Vision insurance
  • Experience level: 2 years
  • Schedule:

    8 hour shift
  • Day shift
  • Monday to Friday
  • No weekends
  • Ability to commute/relocate:
    Aberdeen Proving Ground, MD:
    Reliably commute or planning to relocate before starting work (Preferred)
  • Experience:

    Help desk: 2 years (Preferred)
  • Linux: 6 years (Preferred)
  • License/Certification:
    CompTIA Security+ (Required)
  • Security clearance:
    Top Secret (Required)
  • Work Location:

    In person
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