Summary
Overview
Work History
Education
Skills
Certification
Accomplishments
Interests
Timeline
Languages
Generic
Ayan Chowdhury

Ayan Chowdhury

System Administrator
Kolkata

Summary

Highly skilled, dedicated, and professional Unix System Administrator with over 7.5 years of experience in Unix-based systems, hardware support, server installation and configuration, and operating system maintenance across various physical, standalone, clustered, virtual, and cloud-based environments. Also, having worked as a Azure Administrator with 4+ years of experience. Capable of troubleshooting and possess excellent communication, problem skills, team-working, leadership, multi-tasking, and project management skills.

Overview

11
11
years of professional experience
6
6
years of post-secondary education
6
6
Certificates
3
3
Languages

Work History

Linux System Administrator

Tech Mahindra Limited
07.2024 - Current
  • Company Overview: Tech Mahindra is a global consulting service and systems integrator that operates in over 90+ countries, delivering solutions with a unique blend of digital innovation and robust, industry-strong processes. With their promise to help their customers Scale at Speed, they design future state solutions for industry leaders and offer innovative digital experiences that enable them to transform and scale at speed. Their aim is to enable enterprises, associates, and society to Rise for a more equal world, future readiness, and value creation.
  • Installation, Configuration, Administration and Upgrade of RHEL 7 to RHEL 8 Operating Systems.
  • Installation, Configuration, Administration and Upgrade of RHEL 8 to RHEL 9 Operating Systems.
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • RPM and YUM package installations, patch and other server management.
  • Worked with Application Team to fix issues related to server after upgrade and also helped them to install additional packages that's required after server upgradation.
  • Installed and configured Various agents including centrify, Salt, Dynatrace, Crowdstrike, Encase etc during post upgradation phase.
  • Installing and configuring Docker in Linux based systems.
  • Knowledge of VMware Workstation, vCenter and GCP Portal.
  • Tech Mahindra is a global consulting service and systems integrator that operates in over 90+ countries, delivering solutions with a unique blend of digital innovation and robust, industry-strong processes. With their promise to help their customers Scale at Speed, they design future state solutions for industry leaders and offer innovative digital experiences that enable them to transform and scale at speed. Their aim is to enable enterprises, associates, and society to Rise for a more equal world, future readiness, and value creation.

Unix System Administrator

Tata Consultancy Services Limited
12.2019 - 07.2024
  • Company Overview: Tata Consultancy Services Limited (TCS) is an Indian multinational Information Technology (IT) service and consulting company headquartered in Mumbai, Maharashtra, India. It is a subsidiary of Tata Group and operates in 149 locations across 46 countries. TCS is the largest Indian Company by market capitalization. Tata Consultancy Services is now placed among the most valuable IT services brands worldwide.
  • Worked on Operating Systems- RHEL, Solaris, Oracle Linux as Unix L1/L2 support.
  • Expertise in patching RHEL, Solaris, and Oracle Linux Servers by both manual and automated methods. Also, having experience in Exacs DOM0 and DomU patching and troubleshooting various activities related to Exacs servers.
  • Configuration and Administration of High Availability using Red Hat Pacemaker Cluster, Oracle RAC and Veritas Cluster Servers for failover and redundancy purposes.
  • Coordinating with vendor and do different tasks related to Exadata Administration on oracle linux servers. Also, working closely with vendor to coordinate patching activities on Exadata Engineered Systems.
  • Determine the RCA of various OS issues. Worked on various hardware issues and resolved them in Production and Non-Production Environments. Opening Vendor Cases and working with them to resolve various hardware issues with Vendors like Oracle, HP and Park Place Technologies. Also, resolved various Hardware Issues in M7, Exadata and BDA Engineered Systems like disk, DIMM's , MB etc.
  • Managing Swap Configuration, CPU Optimization and memory maintenance in Physical as well as for Virtual servers. Configured Netbackup on Linux and Solaris Servers as well.
  • Handling P1/P2 incidents and calls and help teams to resolve the issues. Also, need to find the RCA for those issues and prepare Priority Incident Report (PIR).
  • Knowledge of VMware Workstation, vCenter and Azure portal. Skilled in configuring and managing Azure Active Directory for user and role management.
  • Experienced in deploying and maintaining Azure Virtual Machines and related services. Implemented Azure Backup and restore of Virtual Machines in order to protect critical data.
  • Configured Volume Groups and logical Volumes, extended logical volumes for the filesystem growth using LVM, Veritas Filesystem, pool extension in Solaris, M7 pools disk addition and configuration. Involved User Administration, Sendmail Configuration, Netbackup Configuration on RHEL and Solaris.
  • Tata Consultancy Services Limited (TCS) is an Indian multinational Information Technology (IT) service and consulting company headquartered in Mumbai, Maharashtra, India. It is a subsidiary of Tata Group and operates in 149 locations across 46 countries. TCS is the largest Indian Company by market capitalization. Tata Consultancy Services is now placed among the most valuable IT services brands worldwide.

Technical System Analyst in L2 SME Application Support

Cognizant Technology Solutions
12.2018 - 12.2019
  • Company Overview: Cognizant (NASDAQ-100: CTSH) is a world-leading professional services company, transforming business, operating and IT models for the digital era. It is headquartered in Teaneck, New Jersey, United States.
  • L2 SME Production Support. Handling all the support activities of a group of applications pertaining to Market Risk line of business.
  • Coordinated with the team to set up and manage administration tasks, including running disk check commands, backup/restore of servers, and prepared accurate reports on systems.
  • Perform Incident Management activities, drive and perform Change and Release Management activities for concerned applications.
  • Configuring and managing Data load jobs through Autosys scheduler in UNIX environment.
  • Handling client meetings and actively participating in delivery management level meetings.
  • Monitoring application Log errors & perform relevant actions.
  • Provide Root Cause Analysis as part of Defect Prevention and Problem Management.
  • Change/service Request/ COB testing/ Access Requests/ Production checkouts to be carried out on need basis.
  • Cognizant (NASDAQ-100: CTSH) is a world-leading professional services company, transforming business, operating and IT models for the digital era. It is headquartered in Teaneck, New Jersey, United States.

Team Lead/ Technical Analyst (L2)

Cognizant Technology Solutions
10.2016 - 11.2018
  • Level 2 Support- Monitoring regular autosys jobs and if any issue comes during processing then analyze and resolve the issue if it's there in our scope.
  • Resolving medium and low level incidents.
  • Interacting with clients and the onsite/offshore L3 team to solve the issues.
  • Generating daily Status report through script & sending to client.
  • Handling file issues through Unix commands/scripts.
  • Attending calls with the Business and Offshore team on daily basis for Requirement clarifications and delivery Issues.
  • Preparing, updating and uploading Knowledge Transfer documents in the project share point folders.
  • Creation of RCA and project documentation -User Guide doc, Checklist doc, Access Tracker, Left Shift Tracker.
  • Manage team's technical delivery and provide KT and technical training to new joiner.

Team Player/ Transition Lead-Centralized Production Support (L1/L2)/Incident management

Cognizant Technology Solutions
05.2014 - 08.2016
  • Level 1/2 incident management and change management roles. Played an integral part in operational and monitoring genres.
  • Incident management - detected alerts and exceptions and routed them to concerned application teams through incidents based on priority and severity of the issue.
  • Change management - work on change requests, fixed bugs (majorly XML tool kits) and released them to production through Version control tools, Harvest workbench CA.
  • Provided 24
  • 7 support to client applications - monitored databases, health checks in Windows, UNIX servers and SQL platforms. Job checks in Mainframe and Brumon, an application monitoring tool - Troubleshot issues relating to the File, Print, TCP/IP etc.
  • Monthly patch deployment of managed servers as per Microsoft bulletin.
  • Monitoring Services & Providing Daily Report of requested Services.
  • Monitoring Event-log & Providing Daily Report of all events.
  • Providing Remote Assistance to clients for different applications.

Education

Bachelor Of Technology - Electronics and Communication Engineering

WBUT
07.2009 - 07.2013

12th Standard - Science

St. Joseph & Mary's School (CISCE)
04.2006 - 05.2008

10th Standard - Science

St. Joseph & Mary's School (CISCE)

Skills

RHEL8

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Certification

AWS Certified AI Practitioner, 06/01/25, 06/01/28

Accomplishments

  • Received Server Award from Client in TCS, 04/01/23
  • Service & Commitment Award in TCS, 04/01/22
  • On The Spot Award in TCS, 03/01/21
  • Applause for Team Award in TCS, 09/01/20
  • Received Certificate of Excellence number of times from Cognizant for efficient contribution to the excellent Client delivery., 10/01/17
  • Best performer of the team from Cognizant, 08/01/16

Interests

Travelling and Exploring Around the world
Watching Movies
Listening Songs
News and Current Affairs

Timeline

Linux System Administrator

Tech Mahindra Limited
07.2024 - Current

Unix System Administrator

Tata Consultancy Services Limited
12.2019 - 07.2024

Technical System Analyst in L2 SME Application Support

Cognizant Technology Solutions
12.2018 - 12.2019

Team Lead/ Technical Analyst (L2)

Cognizant Technology Solutions
10.2016 - 11.2018

Team Player/ Transition Lead-Centralized Production Support (L1/L2)/Incident management

Cognizant Technology Solutions
05.2014 - 08.2016

Bachelor Of Technology - Electronics and Communication Engineering

WBUT
07.2009 - 07.2013

12th Standard - Science

St. Joseph & Mary's School (CISCE)
04.2006 - 05.2008

10th Standard - Science

St. Joseph & Mary's School (CISCE)

Languages

English
Hindi
Bengali

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