Linux RHEL System Administrator

We are seeking a Linux RHEL System Administrator for a contract position in Plano, Texas. This role requires on-site presence and offers the opportunity to work with enterprise Linux environments, managing system reliability, security, and performance across production, staging, and development environments.

Responsibilities

• Administer, configure, and maintain RHEL-based Linux servers across production, staging, and development environments.
• Perform system installation, patching, upgrades, kernel tuning, and performance optimization.
• Manage user accounts, permissions, file systems, storage, and networking configurations.
• Monitor system health, automate routine tasks, and ensure high availability and uptime.
• Troubleshoot complex OS-level issues and provide root-cause analysis.
• Implement and maintain security best practices, including SELinux, firewalls, and vulnerability remediation.
• Support backup, recovery, and disaster recovery processes.
• Collaborate with application, network, and security teams to support business-critical workloads.
• Document system configurations, procedures, and operational standards.

Qualifications

Required

• Strong hands-on experience with Linux RHEL system administration in enterprise environments.
• Deep understanding of system configuration and hardening.
• Knowledge of networking fundamentals including DNS, DHCP, routing, and firewalls.
• Experience with storage management such as LVM, NFS, and iSCSI.
• Proficiency with system monitoring and log analysis.
• Proficiency with shell scripting (Bash, sh) for automation.
• Experience with package management (YUM, DNF) and system services (systemd).
• Working knowledge of LDAP (NSS/PAM/SSSD) and Sendmail/SMTP.
• Database exposure.
• Familiarity with virtualization technologies such as VMware or KVM.
• Strong troubleshooting and analytical skills.
• Experience with cloud platforms such as AWS, Azure, or GCP.

Preferred

• Knowledge of Infrastructure as Code tools such as Terraform.
• Exposure to CI/CD pipelines and tools including Jenkins, GitLab CI, or GitHub Actions.
• Familiarity with configuration management tools such as Ansible, Puppet, or Chef.
• Understanding of containerization (Docker) and orchestration including Kubernetes or OpenShift.
• Experience with monitoring tools such as Prometheus, Grafana, Nagios, or Zabbix.
• Bachelor's degree in Computer Science, Information Technology, or related field.
• Red Hat certifications such as RHCSA or RHCE.
• Cloud certifications from AWS, Azure, or GCP.
• Strong communication and documentation abilities.
• Ability to work independently and collaboratively in a fast-paced environment.
• Problem-solving mindset with attention to detail.
• Commitment to continuous learning and staying current with emerging technologies.