Karthik Nagarajan

Accomplished Linux Administrator with 15+ years of IT experience (11+ years relevant), proven success in service delivery, client engagement, automation, and tech leadership. Known for strong communication, Proven expertise in troubleshooting, monitoring, and providing critical application support in critical environments. Technical troubleshooting, and exceeding service expectations.

• RHCSA and RHCE 7.X course completed
• IBM Certified – P Series Administration and Support for AIX 5L v5.3.
• GCP Architect - Certified
• CCNA – Security – Certified
• CCNP – Routing & Switching – Certified

• Managing a fleet of 15,000+ servers, including physical, virtual, and cloud-based systems.
• Extensive experience in handling L3/L4 Linux administration tasks.
• Proficient with HP and DELL hardware servers, EMC storage, and NetApp LUNs.
• Experienced with Redhat cluster troubleshooting and managing the resource group.
• Mentored and guided team members, ensuring they are well-trained in product knowledge and capable of performing assigned duties effectively.
• Basic working knowledge of Puppet, Ansible Playbooks, and GitLab.
• Skilled in vulnerability assessment, patch management, and risk assessment processes.
• Experienced with ITSM tools including BMC Remedy, ServiceNow, and JIRA for incident and request management.
• Strong background in operating system installation, package and patch management, peripheral configuration, user account maintenance, system security, performance tuning, and multi-level troubleshooting.
• Generated and reviewed daily efficiency reports to monitor production variances.
• Hands-on experience with various server security and vulnerability management tools.
• Managing and maintaining Red Hat Satellite 6.2, including cleaning up unused or unwanted storage space.
• Basic knowledge of AIX (AIX 7).