KARTHIK NAGARAJAN
Chennai
Summary
IT professional with 15+ years of experience delivering CI/CD automation and process improvements for HCL Tech. Built reliable deployment workflows and streamlined automation to improve system consistency. Skilled in Linux administration, incident response, and high-availability environments.
Overview
1
1
Certificate
21
21
years of professional experience
Work History
Consultant
HCL Tech
Chennai
01.2024 - Current
- Automated build, test, and deployment workflows; developed and maintained CI/CD pipelines; provisioned infrastructure with Terraform; and wrote Ansible playbooks for automation and configuration.
- Resolved complex issues to ensure reliability of critical applications, built and maintained high-availability infrastructure, and supported Linux servers across enterprise data center environments.
- Deployed applications across AWS, Azure, and GCP, managed Nginx and Apache web servers, monitored systems for performance problems, and documented procedures, runbooks, and system configurations.
- Managed access controls and environment settings, coordinated incident response and disaster recovery planning, and collaborated with team members to achieve project goals.
Technical Lead
Wipro Technologies
Chennai
11.2021 - 12.2023
- Worked as a technical lead at Wipro Technologies in Chennai from November 2021 to December 2023.
Technical Specialist
Hexaware Technologies Limited
Chennai
06.2019 - 10.2021
- Worked as a Technical Specialist at Hexaware Technologies Limited in Chennai from June 2019 to October 2021.
Technical Specialist
Klaps Interactive Solutions Pvt Ltd
Chennai
09.2018 - 05.2019
- Worked as a Technical Specialist at Klaps Interactive Solutions Pvt Ltd (Tablytics acquired by Klaps) in Chennai from Sep 2018 to May 2019.
Technical Specialist
Tablytics Market Research Pvt Ltd
Chennai
03.2015 - 08.2018
- Worked as a Technical Specialist at Tablytics Market Research Pvt. Ltd, Chennai, from March 2015 to August 2018.
Technical Specialist
Data prompt International Pvt Ltd
Chennai
11.2008 - 02.2015
- Worked as a Technical Specialist at Data Prompt International Pvt Ltd in Chennai from November 2008 to February 2015.
Technical Specialist
Redefine Systems private Ltd
Chennai
10.2005 - 10.2008
- Worked as a technical specialist at Redefine Systems Private Ltd, Chennai from October 2005 to October 2008.
Education
BCA -
Madras university
01-2012
DIT -
Direct of Technical Education
01-2004
Skills
Certification
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
Timeline
Consultant
HCL Tech
01.2024 - Current
Technical Lead
Wipro Technologies
11.2021 - 12.2023
Technical Specialist
Hexaware Technologies Limited
06.2019 - 10.2021
Technical Specialist
Klaps Interactive Solutions Pvt Ltd
09.2018 - 05.2019
Technical Specialist
Tablytics Market Research Pvt Ltd
03.2015 - 08.2018
Technical Specialist
Data prompt International Pvt Ltd
11.2008 - 02.2015
Technical Specialist
Redefine Systems private Ltd
10.2005 - 10.2008
BCA -
Madras university
DIT -
Direct of Technical Education
PROFESSIONAL EXPERIENCE
- 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).