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Gourav Bhattacharjee

Experienced System Administrator with 6 years in IT, specializing in innovative solutions to optimize computer networks. Proficient in security software and operating systems, with strong teamwork and communication skills to ensure efficient operations.
  • Role

    Security & DNS Specialist (DDI)

  • Years of Experience

    10.83 years

Skillsets

  • SSH
  • Metasploit
  • Motadata
  • NMAP
  • OpenVPN
  • Policy analyzer
  • Postfix
  • Python
  • RHEL
  • Roundcube
  • S3
  • Security Hub
  • SIEM
  • Linux
  • syslog
  • tcpdump
  • Ubuntu
  • VMware
  • VPC
  • VPN
  • vSphere
  • Windows Server
  • WireShark
  • WooCommerce
  • Efficientip
  • DHCP
  • WSUS
  • DNSSEC
  • Hyper-V
  • PHP
  • Wordpress
  • ArcSight
  • AWS
  • Bash
  • BIND
  • CentOS
  • CSS
  • Active Directory
  • DNS
  • Dovecot
  • EC2
  • Firewall
  • Fortinet
  • Git
  • GPO
  • Hydra
  • IAM
  • ISC DHCP
  • LAMP

Professional Summary

10.83Years
  • Sep, 2023 - Present2 yr 7 months

    Security Professional

    Tata Advanced Systems Limited
  • Security Specialist (DDI)

    Tata Advanced Systems Limited
  • Apr, 2021 - Jul, 20232 yr 3 months

    Linux System Administrator

    K12 Techno Services Pvt. Ltd.
  • Jan, 2020 - Aug, 2020 7 months

    System Administrator

    Creaidea India
  • Aug, 2020 - Apr, 2021 8 months

    System Administrator

  • Aug, 2020 - Apr, 2021 8 months

    System Administrator

    Webvio Technologies Private Limited
  • Jun, 2018 - Dec, 20191 yr 6 months

    QA & Tester

    Adeeba E Services

Applications & Tools Known

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    WordPress

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    PHP

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    WooCommerce

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    AWS

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    EC2

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    MS Outlook

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    VM Ware

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    Wireshark

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    PowerShell

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    Putty

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    Hyper V

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    vSphere

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    Git

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    Vcenter

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    Linux

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    S3

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    ESXI

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    OpenVPN

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    Python

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    Monitoring

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    Magento

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    DNS

Work History

10.83Years

Security Professional

Tata Advanced Systems Limited
Sep, 2023 - Present2 yr 7 months

Security Specialist (DDI)

Tata Advanced Systems Limited
    Successfully secured DNS infrastructure and managed critical cybersecurity projects for Odisha Government (OCAC), delivering secure and resilient DNS, DHCP, and IPAM (DDI) solutions for large-scale infrastructure. Configured and maintained authoritative, recursive, and caching DNS servers, ensuring high availability and zero downtime for mission-critical services. Deployed DNSSEC with automated key rollover, ensuring 100% data integrity and authenticity across 200+ DNS zones. Reduced DNS-related security incidents by 40% within six months through proactive monitoring, threat detection, and rapid incident response. Conducted security audits, vulnerability scans, and risk assessments to proactively identify and remediate potential threats to DNS/DHCP infrastructure. Developed standardized DNS/DHCP security policies and best practices, improving operational security across multiple government data centers. Performed regular vulnerability scans & patching to mitigate threats proactively.

Linux System Administrator

K12 Techno Services Pvt. Ltd.
Apr, 2021 - Jul, 20232 yr 3 months
    Maintained & secured Linux/Windows infrastructure ensuring 24x7 uptime for 2,000+ users. Hardened Linux cloud servers, deployed AWS IAM access policies, reducing unauthorized access. Managed and secured Active Directory infrastructure, implementing GPOs for security hardening and user access control. Implemented and maintained Fortinet firewalls, DNS, DHCP, NFS, SSH, and VPN security policies, reducing network vulnerabilities and improving compliance. Deployed and managed Hyper-V & ESXI virtualized environments, troubleshooting performance issues. Automated patch management & security updates, reducing manual effort by 40%. Supported cloud security (AWS IAM, S3, EC2) and implemented access controls.

System Administrator

Webvio Technologies Private Limited
Aug, 2020 - Apr, 2021 8 months
    Installed, configured, and maintained Linux servers (RHEL, Ubuntu), ensuring secure and stable operations for enterprise environments. Configured firewalls, VPNs & network segmentation to protect critical systems. Automated server tasks such as backups, monitoring, and log management using scripts, improving operational efficiency. Deployed and maintained virtual machines and templates using VMware ESXi, including VM cloning, snapshots, and migrations to ensure high availability and optimized resource utilization. Configured and secured LAMP and mail services (Postfix, Dovecot, Roundcube), supporting 500+ users with reliable uptime.

System Administrator

Aug, 2020 - Apr, 2021 8 months

System Administrator

Creaidea India
Jan, 2020 - Aug, 2020 7 months
    Configured and maintained Linux & Windows servers for security-critical applications. Configured and serviced software across diverse equipment, including routers, servers, and Firewalls. Improved network security with firewall hardening & vulnerability patches. Managed user access controls and endpoint protection solutions. Supported audits & incident response for sensitive infrastructure.

QA & Tester

Adeeba E Services
Jun, 2018 - Dec, 20191 yr 6 months
    Performed application security testing to identify vulnerabilities. Worked with developers to patch critical bugs and enhance system security. Conducted root-cause analysis on security incidents improving coverage.

Major Projects

3Projects

eCommerce website

    Developed an eCommerce website using WordPress, Custom CSS, PHP, and WooCommerce.

Tattoo website for blog

    Created a tattoo blog website using WordPress, Custom CSS, PHP, and WooCommerce.

Portfolio Website

    Built a personal portfolio website using WordPress, Custom CSS, and PHP.

Education

  • Secondary

    Nimta High School (2013)
  • Higher Secondary

    Nimta High School (2015)
  • B.com

    SVSU University (2020)
  • ITI

    Tollyguange ITI (2016)
  • MCA

    Chandigarh University

Certifications

  • Endpoint security by cisco

  • Efficent ip ddi support