Ganesh Vishal

Senior Network Security Engineer with 8+ years of experience delivering enterprise network security solutions. Expertise in Palo Alto Networks Firewalls, Panorama, Zscaler ZIA/ZPA, Arbor TMS, and AlgoSec Firewall Analyzer. Experienced in firewall administration, firewall migrations, policy lifecycle management, security optimization, firewall governance, IPSec VPN, PAN-OS upgrades, incident response, and production change implementation.

Senior Analyst III – Network Security - DXC Technology

(2026-05)

• Centralized security operations and managed 200+ Palo Alto Networks Firewalls globally utilizing 2 Panorama management platforms.
• Engineered and optimized advanced PAN-OS features, including App-ID, User-ID, URL Filtering, WildFire, and Threat Prevention, transitioning the enterprise from port-based to application-centric security.
• Leveraged AlgoSec Firewall Analyzer to perform automated compliance audits and risk analysis, safely decommissioning 30% of redundant and unused rules to maximize hardware efficiency.
• Established a streamlined firewall rule recertification lifecycle, collaborating with application owners to eliminate stale access and enforce regulatory compliance.
• Scaled secure remote access infrastructure by managing Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA) for 5,000+ enterprise users.
• Mitigated real-time DDoS threats using Arbor TMS, ensuring 100% availability of critical internet-facing perimeter infrastructure.

Senior Software Engineer - Wipro Limited

(2024-07 - 2026-05)

• Successfully engineered and executed 25+ complex firewall migration and onboarding projects (legacy-to-NextGen Palo Alto) with zero unplanned production downtime.
• Orchestrated large-scale PAN-OS code upgrades across production clusters, mitigating critical CVE vulnerabilities while maintaining 99.9% network uptime.
• Isolated and resolved complex Tier-3 network security incidents by executing deep-dive packet captures via CLI, Wireshark, and TCPDump.
• Coordinated production changes, managed high-availability IPSec VPN architectures, and supported cross-functional incident response efforts.

Firewall Administrator - Crown Solutions India Pvt Ltd

(2023-11 - 2024-07)

Client: TCS/TMNA

• Provisioned day-to-day enterprise firewall modifications, configuring optimized Source/Destination/Bi-directional NAT rules and security policies.
• Performed routine firewall security audits and hardening activities to align infrastructure with enterprise security baselines.
• Provided robust operational and troubleshooting support for complex site-to-site VPNs and core network traffic flows.

Network Administrator - OvalEdge

(2023-07 - 2023-10)

Network Administrator - Skill-Lync

(2022-11 - 2023-07)

System Administrator - Yaway Technologies Pvt Ltd

(2021-11 - 2022-10)

Assistant Design Engineer - Elentech Engineering Services Pvt Ltd

(2016-01 - 2021-10)

Bachelor of Engineering - R.M.D. Engineering College, Chennai (2016)