Senior Network Security Engineer
Pahalawan Singh

Cisco R&S • SD-WAN • Palo Alto • Fortinet • Automation • Network Design

I design, secure, and optimize enterprise networks with a focus on high availability, low latency, and scalable security architecture for production‑critical environments.

About Me

Network Security Engineer specializing in secure, scalable, and high‑availability network infrastructures.

Building Secure, High‑Performance Networks for Modern Enterprises.

I am a Network Security Engineer with hands‑on experience in Cisco Routing & Switching, SD‑WAN, Palo Alto, Fortinet, and high‑availability network designs. My focus is on building reliable, low‑latency, and secure infrastructures that support business‑critical operations.

My goal is to deliver secure, stable, and future‑ready networks that empower organizations to operate without interruption.

I work daily on firewall engineering, routing, VPNs, traffic analysis, automation, and troubleshooting real‑world issues. I enjoy breaking down complex network problems and deploying clean, scalable, and efficient solutions across enterprise environments.

What I Do

Delivering secure, scalable, and high‑performance network solutions.

Network Design & Architecture

Designing secure, scalable, and high‑availability network infrastructures using Cisco R&S, VLANs, HSRP/VRRP, BGP/OSPF, and enterprise best practices.

Firewall Engineering & Security Policies

Deploying, configuring, and optimizing Palo Alto and Fortinet firewalls, NAT, VPNs, SSL inspection, HA pairs, threat prevention, and zero-trust access policies.

SD‑WAN Deployment & Optimization

Building and maintaining SD-WAN fabric, tuning BFD, TLOCs, DIA policies, and ensuring low-latency, resilient connectivity for mission-critical applications.

Work Experience

Over 6 years of experience across network engineering, security operations, and IT infrastructure.

FinQuest Consulting Services (Mumbai)

Senior Network Security Engineer

May 2025 – Present

Owns network & security operations for enterprise environments: Cisco routers/switches (IOS), BGP/EIGRP, VLANs, RSTP, MPLS, policy‑based routing and filtering; Palo Alto & Fortinet firewalls with GlobalProtect VPN, URL filtering, NAT, IPSec; monitoring and threat analysis with SolarWinds, PRTG, Wireshark; incident handling via SymphonyAI; Syslog and SNMPv3 for proactive visibility.

Cisco R&S • Palo Alto • Fortinet • MPLS

Outworks Solutions Pvt. Ltd.

Oct 2022 - may 2025

Monitored and optimized network performance; conducted audits and patching; Tier‑1 troubleshooting to minimize downtime; documented topologies/configurations; maintained device inventory; configured Cisco routers/switches; implemented VLANs/VPNs; hands‑on SolarWinds monitoring.

Monitoring • VLAN/VPN • Audit & Compliance

Quess Corp Limited (Mumbai)

Desktop Support Engineer

Nov 2021 – Oct 2022

Enterprise endpoint security and user support: Trend Micro/McAfee encryption, Zscaler installation/configuration, laptop/desktop troubleshooting and incident assistance.

Endpoint Security • Zscaler • User Support

Impact InfoTech Pvt. Ltd

Desktop Support Engineer

May 2019 – Sep 2021 (combined 2 Project)

Supported 50+ endpoints and high‑end printers; video‑conferencing setups; WebEx AGM/Shareholder meeting support; Windows/Server installation, Outlook/Lync configuration; basic routing (D‑Link), cabling; SLA and security compliance.

Enterprise Support • Windows/Server