Avijit Ghosh
Kolkata
Summary
Experienced Linux Administrator with over 9 years of expertise in Linux infrastructure, automation, cloud platforms, and system security. Skilled in Linux and AIX administration, Ansible, Terraform, shell scripting, Docker, Kubernetes, and AWS, IBM Cloud, and Google Cloud Platform. RHCSA-certified professional focused on improving system reliability, performance, and operational efficiency.
Overview
2
2
Certification
9
9
years of professional experience
Work History
Senior Infrastructure Specialist
IBM
03.2024 - Current
- Maintain Linux and AIX systems on a daily basis to ensure system stability and performance.
- Initiate and manage patching activities to keep systems secure and up to date.
- Modify infrastructure using Terraform for efficient and scalable deployments.
- Implement Linux system changes using Ansible Tower and AWX for streamlined automation.
- Perform backups according to business requirements to ensure data integrity and availability.
- Maintain and modify Pacemaker and CRM cluster configurations to support high availability and fault tolerance.
Linux Administrator
Global IDs
07.2022 - 03.2024
- Installed, configured, and maintained Linux and Windows operating systems and related software.
- Implemented and enforced security measures including firewalls, antivirus, and intrusion detection systems.
- Monitored system performance and troubleshot operational issues.
- Automated recurring tasks using shell scripts and Ansible.
- Maintained servers, backup files, and script management systems.
- Managed server and workstation patching.
- Ensured network security and compliance with industry requirements.
- Set up and configured cloud environments across AWS, Azure, and Google Cloud Platform.
- Managed cloud resources including virtual machines, storage, and networking.
- Worked with development and operations teams to deploy and maintain cloud-based applications.
- Performed instance hardening to improve security posture.
Technical Executive
Globetek Infoway Pvt Ltd.
08.2017 - 07.2022
- Provided end-to-end ISP network support and contributed to NOC setup and implementation across APAC, SAARC, Africa, and the Middle East.
- Supported hotspot solutions for hospitality clients.
- Delivered enterprise network support for telecom environments.
- Supported ISP clients for speed test servers, NFS, and Linux web servers.
- Managed UTM device support including SonicWall, Cyberoam, Sophos, and Fortinet solutions.
- Provided antivirus platform support including Bitdefender and Trend Micro console environments.
Technical Executive NOC
Basis Technologies Pvt Ltd.
09.2016 - 07.2017
- Monitored network performance, identifying and addressing potential issues to minimise outages.
- Managed Radius, caching, and log servers to optimise service delivery and reliability.
- Managed and monitored network-based services such as DNS and DHCP.
- Facilitated ISP core network setup and ongoing maintenance to ensure operational stability.
Education
Graduation - Sociology, Education, Geography
West Bengal State University
Kolkata01-2015
Standard XII / H.S.C. - Geography
Barasat Satyabharati Vidyapith
Kolkata, WB01-2012
High School - Mathematics
Barasat Satyabharati Vidyapith
Kolkata, WB01-2010
Skills
- AWS
- Linux administration
- Linux system administration
- Ansible
- Ansible Tower
- Terraform
- Docker
- Kubernetes
- IBM Cloud
- Cloud management
- Shell scripting
- Automation scripting
- Networking
- Volume management
- Linux file systems
- Troubleshooting
- Technical troubleshooting
- Patching and backups
- Infrastructure security
- Incident response
- Technical troubleshooting
- Incident response
Languages
English
Proficient
C2
Hindi
Proficient
C2
Bengali
Proficient
C2
Certification
- Red Hat Certified System Administrator (RHCSA)
- ITIL® Foundation Certificate in IT Service Management
Accomplishments
- Recognised by management for projects delivering outstanding.
- Received recognition from management for successfully delivering the migration activities.
- Received recognition for contributions and support during the ISO Audit 2025.
Client and Project Work
- ISP complete network support and NOC setup for national and international deployments.
- Hospitality hotspot solution support for hotel and enterprise environments.
- Enterprise network support for telecom clients.
- Speed test server, NFS, and Linux web server support for ISP clients.
- UTM device support including SonicWall, Cyberoam, Sophos, and Fortinet.
- Antivirus console support including Bitdefender and Trend Micro.
- ISP core network setup, monitoring, and maintenance.
- Server management for Radius, caching, and log servers.
- DNS and DHCP service monitoring and support.
Timeline
Senior Infrastructure Specialist
IBM
03.2024 - Current
Linux Administrator
Global IDs
07.2022 - 03.2024
Technical Executive
Globetek Infoway Pvt Ltd.
08.2017 - 07.2022
Technical Executive NOC
Basis Technologies Pvt Ltd.
09.2016 - 07.2017
Graduation - Sociology, Education, Geography
West Bengal State University
Standard XII / H.S.C. - Geography
Barasat Satyabharati Vidyapith
High School - Mathematics
Barasat Satyabharati Vidyapith