Senior Linux Admin - Red Hat, On-Site Atlanta

Dexian; Atlanta (GA); On-site; USD 110,000 - 170,000; Full time

Job summary

Dexian seeks a seasoned Systems Administrator to support a mission-critical federal program on-site in Atlanta, GA. The role focuses on designing, deploying, and maintaining secure Red Hat Enterprise Linux environments, with emphasis on automation and networking.

Responsibilities include scripting (BASH/Perl/JS/Python), Ansible, RHEL Satellite, and managing DNS, mail relays, and security baselines. Collaboration and mentorship of teammates are key.

Qualifications

• Bachelor's degree or equivalent combination of education and experience.
• 10+ years of Linux/UNIX system administration experience with Windows interoperability.
• RHCSA/RHCE/RHCA certification.
• Proficiency in scripting languages: BASH, Perl, JavaScript, Python.
• Hands-on experience with Ansible and RHEL Satellite.
• Familiarity with container runtimes (Docker), AWS, and GitLab.
• Strong problem-solving, communication, and documentation skills.
• Ability to work independently and in a team.
• Availability for 24/7/365 on-call rotation.

Responsibilities

• Design, deploy, troubleshoot, and maintain Red Hat Enterprise Linux Server environments (RHEL 8/9).
• Develop and maintain automation scripts using BASH, Perl, JavaScript, or Python.
• Perform administration from the command line interface.
• Automate tasks and configurations with Ansible and RHEL Satellite.
• Manage package deployment across distributed environments.
• Configure and administer network services (NFTables, Firewalld, IPTables, DNS, TCP/IP, IPv4/IPv6, Postfix).
• Oversee Linux server clustering, NFS (v3/v4), PXE boot, and SELinux.
• Support container runtimes, cloud platforms, and GitLab.
• Document system architecture and configurations.
• Collaborate with teams on infrastructure projects.
• Mentor junior team members.
• Troubleshoot LAN/WAN connectivity and performance.
• Ensure compliance with CIS, NIST SP 800-53 r5, and DISA STIGs.

Skills

RHCSA/RHCE/RHCA

Bash scripting

Perl scripting

JavaScript

Python

Ansible

RHEL Satellite

Windows interoperability

AWS

GitLab

Docker

Networking

On-call rotation

Education

Bachelor's degree in Computer Science or related field

Tools

Ansible

RHEL Satellite

GitLab

Job description

Dexian seeks a seasoned Systems Administrator to support a mission-critical federal program on-site in Atlanta, GA. The role focuses on designing, deploying, and maintaining secure Red Hat Enterprise Linux environments, with emphasis on automation and networking.

Responsibilities include scripting (BASH/Perl/JS/Python), Ansible, RHEL Satellite, and managing DNS, mail relays, and security baselines. Collaboration and mentorship of teammates are key.