Linux System Administrator (L3)

Job Summary:

We are looking for an experienced Linux System Administrator (L3) to manage enterprise infrastructure, handle critical incidents, and ensure operational excellence. The role involves advanced troubleshooting, automation, system optimization, and coordination with global stakeholders while acting as an escalation point and mentoring team members.

Key Responsibilities:

• Act as the first point of escalation for technical and process-related issues.
• Provide technical expertise and ensure timely resolution of critical incidents.
• Perform root cause analysis (RCA) for major incidents.
• Plan and execute changes in coordination with stakeholders.
• Handle service requests and incidents within agreed SLAs.
• Perform trend analysis and drive incident reduction initiatives.
• Troubleshoot hardware issues and coordinate with vendors.
• Contribute to service improvement and optimization programs.
• Support new server builds, OS upgrades, and migration activities.
• Automate routine tasks using shell/Perl scripting.
• Train and mentor new team members.
• Ensure adherence to security, quality, and ITIL processes.

Qualifications and Skills:

Technical Skills (Must Have):

• Strong expertise in Linux Administration (RHEL, CentOS, SUSE)
• Hands-on experience with KVM and virtualization
• Expertise in LVM configuration and management
• Experience in Satellite Server management and configuration
• Knowledge of Dell and HP server hardware and firmware upgrades
• Strong skills in advanced shell scripting
• Experience in RedHat/Veritas cluster configuration
• Knowledge of NIS/NIS+ and DNS configuration
• Experience in patch management and OS recovery
• Hands-on experience in NFS and automount configuration
• Expertise in OS crash analysis and performance tuning

Secondary Skills (Nice to Have):

• Experience in AIX system administration and IBM Power Systems (POWER7/8/9/10)
• Knowledge of HMC, LPAR/DLPAR, PowerVM, VIOS administration
• Experience in PowerHA (HACMP), clustering, and failover testing
• Experience in OS migrations using NIM and firmware updates
• Knowledge of Solaris (8/9/10/11), Zones, and LDOM administration
• Familiarity with Oracle Ops Center tools
• Knowledge of storage technologies (SVM, VxVM, ZFS)
• Exposure to VMware environments
• Cross-domain knowledge (Storage, Backup, Database, Middleware, Network)

Certifications:

• ITIL Certification – Preferred

Process & Tools:

• Strong understanding of ITIL processes
• Experience with ticketing and monitoring tools
• Vendor coordination and capacity management

Behavioral Skills:

• Strong written and verbal communication skills
• Ability to work under pressure in dynamic environments
• Experience working with global customers
• Flexible and proactive approach