Gourav Bhattacharjee

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.

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.

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.

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.

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.