Linux Administrator

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

This position requires 5 days on site in Atlanta, GA Position Summary

We are seeking a highly skilled and experienced Systems Administrator with expertise in Linux, specifically Red Hat Enterprise Linux, to support a mission-critical federal program. The successful candidate will have in-depth knowledge of Linux system administration, scripting, automation, and networking. This role involves designing, implementing, maintaining, and optimizing Linux environments to ensure reliable and secure operations.

Key Responsibilities

• Design, deploy, troubleshoot, and maintain Red Hat Enterprise Linux Server environments (version 8 and 9).
• Develop and maintain advanced automation scripts utilizing BASH, Perl, JavaScript, or Python.
• Perform administration and operational tasks from the command line interface.
• Automate tasks and manage configurations using tools such as Ansible and RHEL Satellite.
• Manage package deployment and updates across multiple geographically dispersed environments.
• Configure and administer network services including NFTables, Firewalld, IPTables, ISC2 BIND DNS, TCP/IP, IPv4/IPv6, and Postfix/SMTP relay.
• Oversee Linux server clustering, NFS filesystems (NFSv3 and NFSv4), PXE boot environments, and SELinux configurations.
• Support container runtime environments (formerly Docker), cloud platforms, and code management systems like GitLab.
• Maintain comprehensive documentation of system architecture, configurations, and processes.
• Collaborate with cross-functional teams to support infrastructure projects.
• Provide mentorship to junior team members.
• Troubleshoot and resolve LAN/WAN connectivity and performance issues.
• Ensure systems adhere to security hardening standards such as CIS, NIST SP 800-53 Revision 5, and DISA STIGs.

Required Qualifications

• Bachelor's degree in computer science, Information Systems, Cybersecurity, or a related field, or an equivalent combination of education and experience.
• Over 10 years of experience in Linux/UNIX system administration with interoperability experience with Windows.
• Current certification in Red Hat Enterprise Linux (e.g., RHCSA, RHCE, or RHCA).
• Proficiency in scripting languages including BASH, Perl, JavaScript, or Python.
• Hands-on experience with automation tools such as Ansible and RHEL Satellite.
• Familiarity with container runtimes (formerly Docker), cloud services like AWS, and code repositories such as GitLab.
• Strong problem-solving, communication, and documentation skills.
• Ability to work independently and within a team environment.
• Availability to participate in a 24/7/365 on-call rotation.

Why This Opportunity May Be Appealing

This role offers the chance to work on a mission-critical project within a dynamic government-focused environment, employing advanced Linux system management and automation techniques. Candidates will have the opportunity to contribute to critical infrastructure, collaborate with multidisciplinary teams, and refine their skills in a challenging, impactful setting.

Dexian stands at the forefront of Talent + Technology solutions with a presence spanning more than 70 locations worldwide and a team exceeding 10,000 professionals. As one of the largest technology and professional staffing companies and one of the largest minority-owned staffing companies in the United States, Dexian combines over 30 years of industry expertise with cutting-edge technologies to deliver comprehensive global services and support. Dexian connects the right talent and the right technology with the right organizations to deliver trajectory-changing results that help everyone achieve their ambitions and goals.To learn more, please visit https://dexian.com/. Dexian is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, sexual orientation, gender identity, age, national origin, ancestry, citizenship, disability, or veteran status.