Linux Admin
Ajay Shankar Sivasankaran
It Analyst
Chennai
Summary
Dynamic IT Analyst with a proven track record at Tata Consultancy Services, excelling in IT troubleshooting and risk assessment. Enhanced user experience and minimized downtime through proactive strategies. Adept at problem-solving and fostering team collaboration, driving significant improvements in operational efficiency and user satisfaction.
Thorough team contributor with strong organizational capabilities. Experienced in handling numerous projects at once while ensuring accuracy. Effective at prioritizing tasks and meeting deadlines.
Overview
6
6
years of professional experience
2
2
Languages
Work History
IT Analyst
Tata Consultancy Services
06.2024 - Current
- Streamline administration via ServiceNow solutions.
- Implemented expert troubleshooting, managing complex technical problems for end users swiftly.
- Proficient in Linux and Windows administration, demonstrating hands-on expertise in end-to-end server builds, configurations, and lifecycle management.
- Executed application upgrades and maintenance for GitLab (including runner updates), Jenkins (with plugin management), Puppet, and MongoDB on Linux environments, ensuring stability, and minimizing downtime.
- Provided expert support, troubleshooting complex technical problems for end-users in a timely manner.
- Managed Kubernetes clusters using Rancher; redeployed the NGINX Ingress Controller to restore production site availability, and performed log collection and troubleshooting for incident resolution.
- Established Imperva Web Application Firewall (WAF) configurations through the implementation of custom rules for new site launches and tailored client page redirections, improving application security and aligning with business needs.
- Troubleshot critical incidents involving network outages or security breaches, swiftly implementing remediation plans to minimize impact on operations.
- Increased user satisfaction by providing comprehensive IT support and training.
- Reduced system downtime, ensuring timely backups and disaster recovery plans were in place.
- Administered AWS accounts and IAM users, involving the creation of new accounts, user onboarding, and undertaking administrative duties such as snapshot cleanup and resource optimization.
- Managed end-to-end SSL/TLS certificate lifecycle, including CSR generation, renewal of external certificates via DigiCert, and internal certificate management on Microsoft Active Directory Certificate Services (AD CS), ensuring compliance with PKI standards, and secure communication across enterprise systems.
- Reduced manual processes, automating routine tasks to free up resources for strategic initiatives.
- Performed application deployments through Jenkins by triggering builds based on branch IDs provided by the application team, ensuring smooth, and accurate release delivery.
- Managed user access on the Azure GitHub EMU platform, including provisioning GitHub Copilot licenses and onboarding users.
- Orchestrated Linux patching automation through Jenkins, ensured uptime verification with Ansible, and solved issues on unpatched machines.
Senior Systems Engineer
Cognizant Technologies
05.2020 - 05.2024
- Performed root cause analysis to provide resolutions for production issues.
- Mentored junior engineers in advanced concepts, fostering professional development within the team.
- Troubleshot hardware components to identify root causes of malfunctions, reducing equipment downtime substantially.
- Created detailed reports on engineering activities and findings.
- Reinstalled SCCM, identified unpatched machines via Tenable, and manually applied patches on Windows systems.
- Investigated GitLab pipeline failures, performed RCA, and coordinated with the development team for resolution.
- Optimized server configuration in Nagios, assigning it to relevant monitoring groups for effective system oversight.
- Executed LVM disk integration on CentOS and AlmaLinux systems amid critical scenarios to secure system stability.
- Tackled Windows incidents through the ticketing system, covering OneDrive sync issues, service failures, drive size adjustments, and user onboarding to AD server groups, and group policy updates to guarantee timely delivery.
- Migrated all business-critical Linux systems from CentOS to AlmaLinux, guaranteeing seamless transition and minimal downtime.
PCDM/HC Insurance & OPS Senior Associates
NTT Data
03.2019 - 04.2020
- Proactive professional exhibiting robust sense of personal responsibility.
- Exhibited proficiency in swiftly acquiring knowledge and adapting to novel environments.
- Talented in performing independently and contributing effectively to team dynamics.
- Supported day-to-day operations, engaging efficiently and collaboratively with all team members.
- Resourceful and capable of quickly grasping new concepts while maintaining high efficiency.
- Acquired and applied knowledge of new technology and software applications rapidly
Education
Bachelor of Engineering - Computer Science
Karpagam University
Coimabtore 05.2001 -
Skills
IT troubleshooting
Accomplishments
- Achieved Site launches by completing ontime with accuracy and efficiency.
- Achieved Linux patching by introducing Ansible to check uptime for Linux Patching tasks.
- Resolved product issue through consumer testing.
Software
Windows Admin
AWS Admin
Jenkins
Gitlab
Nagios
Rancher
Timeline
IT Analyst
Tata Consultancy Services
06.2024 - Current
Senior Systems Engineer
Cognizant Technologies
05.2020 - 05.2024
PCDM/HC Insurance & OPS Senior Associates
NTT Data
03.2019 - 04.2020
Bachelor of Engineering - Computer Science
Karpagam University
05.2001 -
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