Linux Administrator L2

Job Summary:

The Linux L2 Engineer provides operational support for enterprise Linux infrastructure supporting ERE Tools and Compute services. The role focuses on monitoring, incident resolution, server health, patching, access and authentication support, virtualization interfaces, and service restoration within agreed SLAs. The engineer works with cross-functional infrastructure teams and escalates complex or recurring issues to L3, engineering, or vendor support with clear technical evidence.

Key Responsibilities:

• Linux Operations and Administration
• Administer and support enterprise Linux servers, primarily RHEL or equivalent distributions, across physical and virtual environments.
• Perform user, group, file-system, package, process, service, SSH, sudo, cron, and systemd administration.
• Monitor CPU, memory, disk, inode, file-system, process, and network utilization; take corrective action before service impact.
• Execute approved operational requests and maintain accurate configuration and inventory records.
• Incident, Problem and Alert Management
• Monitor operational alerts and queues, validate events, diagnose faults, and restore service within agreed response and resolution targets.
• Perform structured troubleshooting using system logs, journal logs, application logs, OS utilities, and monitoring data.
• Conduct initial root-cause analysis for recurring incidents and contribute evidence, timelines, and remediation actions.
• Escalate major or unresolved issues to L3, engineering, security, network, storage, database, or vendor teams and track through closure.
• Patching, Maintenance and Change Support
• Perform pre-checks, patch deployment support, post-validation, reboot coordination, and rollback readiness for Linux servers.
• Support planned power, maintenance, migration, deployment, and disaster recovery activities.
• Execute changes through approved ITIL processes, document implementation results, and communicate risks or failures promptly.
• Tools, Compute and Virtualization Support
• Support Linux-hosted monitoring or infrastructure tools, including service availability, agents, integrations, and log collection.
• Provide L2 support for KVM and remote-management environments, including VM health, console access, and basic configuration troubleshooting.
• Assist with device discovery, onboarding, alert validation, and performance or configuration monitoring activities where applicable.
• Troubleshoot dependencies involving DNS, DHCP, NTP, Active Directory or LDAP authentication, storage mounts, network connectivity, and certificates.
• Operational Governance and Communication
• Own assigned incidents, service requests, alerts, and change tasks from acceptance through closure with complete work notes.
• Provide timely status, restoration, and resolution communication to stakeholders and during major incidents.
• Maintain SOPs, knowledge articles, troubleshooting guides, shift handovers, and recurring-issue records.
• Participate in 24x7 rotational shifts, on-call support, and operational handoffs as required by the service.

Skill Requirement:

• Red Hat certification such as RHCSA or RHCE, or equivalent Linux certification.
• Hands-on exposure to Ansible, Python, or shell-based automation.
• Experience with Azure-hosted Linux workloads and cloud operations.
• Working knowledge of ServiceNow, enterprise monitoring platforms, vulnerability remediation, and security hardening.
• Exposure to Kubernetes or container platforms is beneficial but not mandatory.

Additional Requirement:

• Expected L2 Proficiency
• Linux administration: RHEL/CentOS/Oracle Linux/SUSE or equivalent; command-line troubleshooting and system operations
• System service:s systemd, boot process, package management, cron, SSH, sudo, permissions, processes and log management
• Storage: LVM, file systems, mount points, NFS, capacity and inode troubleshooting
• Networking: TCP/IP fundamentals, DNS, DHCP, routing basics, ports, firewall concepts and connectivity diagnostics
• Monitoring and logs: Alert validation, performance monitoring, syslog/journald and common Linux diagnostic tools
• Operations processes: Incident, request, problem and change management; SLA-driven production support
• Virtualization: Working knowledge of KVM/VMware and remote console or server-management interfaces
• Scripting: Basic shell scripting; ability to read or modify scripts for repeatable operational tasks
• Enterprise integration: Basic knowledge of Active Directory/LDAP authentication, certificates and access management