L3 Linux & Red Hat Administrator
Summary
L3 Linux Administrator managing mission-critical RHEL infrastructure in 24x7 production at Axis Direct: Red Hat HA/Pacemaker clustering, Satellite-based patching and lifecycle management, OS hardening and VAPT remediation, Ansible automation, plus DR, backup, and L3 incident support.
Role Overview
We are looking for an experienced L3 Linux Administrator with strong hands-on expertise in RHEL administration, Red Hat Clustering, Pacemaker Cluster, Red Hat Satellite, and OS patching. The role involves managing mission-critical Linux infrastructure, ensuring high availability, security, performance, and stability across 24x7 production environments.
Key Roles & Responsibilities
- Administer, configure, troubleshoot, and maintain RHEL/Linux servers in enterprise production environments.
- Hands-on experience in Red Hat HA Clustering and Pacemaker Cluster, including cluster configuration, resource management, failover/failback, fencing, and quorum.
- Manage Red Hat Satellite for repository management, patching, package updates, and system lifecycle management.
- Plan and execute OS patching, upgrades, security updates, and vulnerability remediation.
- Perform Linux OS hardening, VAPT remediation, performance monitoring, and root-cause analysis.
- Automate routine administrative tasks using Ansible and playbooks.
- Troubleshoot production incidents and provide L3 support for critical infrastructure issues.
- Support DR activities, backup/recovery, and infrastructure monitoring.
- Coordinate with database, network, storage, security, and application teams.
- Maintain technical documentation and follow ITIL-based incident, problem, and change management processes.
Mandatory Technical Skills
- Strong hands-on experience in RHEL/Linux Administration.
- Red Hat HA Clustering and Pacemaker Cluster.
- Red Hat Satellite Administration.
- OS Patching, Upgrades, and Lifecycle Management.
- Linux troubleshooting, security hardening, and VAPT remediation.
- Ansible automation and scripting.
- Linux performance monitoring, networking, and production incident management.
Good to Have
- VMware, SAN/Storage, Veeam, Veritas NetBackup, and SNMP monitoring tools.
- OS-level support for Oracle, PostgreSQL, MySQL, and MongoDB.
- Experience in 24x7 mission-critical production environments.
Education: Bachelors degree in Computer Science, IT, Engineering, or an equivalent qualification. Relevant Red Hat and Ansible certifications will be an added advantage.