5+ years securing enterprise infrastructures — FortiGate, Sophos, Cisco, BGP/OSPF, VPN, ISMS. Currently Sr. IT Engineer at Kolpolok Limited.
A short introduction to my background, expertise, and the kind of work I love doing.
In this short video I walk through my background in enterprise network security, the tools I use daily, and how I approach complex infrastructure challenges — from FortiGate firewall migrations to ISP-level BGP routing.
With over 5 years of experience in network and cybersecurity, I specialize in designing, securing, and optimizing complex IT infrastructures across enterprise environments, with expertise in network architecture (LAN/WAN), VPN technologies, and advanced security implementations including Fortinet FortiGate, Sophos UTM, and Palo Alto firewalls. I bring strong proficiency in routing and switching (Cisco, BGP, OSPF) and system administration across Windows Server, Linux, and Unix platforms, while actively developing VPN protocol automation scripts (Singbox, Hysteria2) using Bash to support scalable infrastructure operations. I also lead ISO/IEC 27001 implementation and compliance maintenance, covering policy development, audit readiness, and security governance, alongside experience in data center networking, performance optimization, patch management, and proactive threat mitigation. Having resolved 1,200+ technical cases, I focus on improving system reliability, strengthening security posture, and driving operational efficiency through automation and best practices.
From network administration to enterprise security engineering — a 5-year progression through Bangladesh's leading technology firms.
Industry-recognized credentials in firewall engineering, network security, and system administration.
Fortinet
FortiOS 7.2 certified. Covers FortiGate firewall management, VPN, IPS, web filtering, and advanced threat protection.
Fortinet
Foundation-level understanding of the cybersecurity threat landscape and Fortinet's core security products and solutions.
Microsoft
Exam 70-740: Installation, Storage & Compute with Windows Server 2016. Achieved a distinction-level score of 933.
Cisco / Creative IT Institute
Network fundamentals, routing & switching, IP connectivity, VLANs, STP, security fundamentals, and network automation.
ICSI, United Kingdom
Modern network security covering encryption, firewalls, IDS/IPS, VPN architecture, vulnerability assessment, and threat intelligence.
Mile2
Security awareness fundamentals: social engineering, phishing defense, password best practices, and organizational incident response.
BYLC
In 2017, I have participated and successfully completed BBLT’17. Building Bridges through Leadership Training (BBLT) is Bangladesh Youth Leadership Center’s 10-week long signature leadership training program.
Real-world firewall deployments, ISP network configs, VPN setups, and homelab security builds.
Project Summary ISO 27001:2022 implementation was the core focus of my role in 2024, where I served as an ISMS…
Secure, Scalable Server Room Design & Deployment for an Edu-Tech Company Project Overview Client BacBon Ltd (Edu-Tech Company) Location Dhaka,…
Overview This project involved a full-scale enterprise firewall migration and fresh deployment for one of the largest vehicle manufacturers in…
Routing & ISP Project Overview Client Internet Service Provider (ISP) — Confidential Location Moghbazar, Dhaka, Bangladesh Date September 2021 Role…
GRE Tunneling for Multi-Branch WAN Connectivity Project Overview Client RMG Company (Confidential) Location Gazipur, Bangladesh Date July 2023 Role Project…
Firewall configs, network writeups, lab builds, and field notes from enterprise security work.
Walkthrough
Wazuh installation on Ubuntu 22.04 is a straightforward process when you follow a structured, step‑by‑step approach. In this guide, you’ll learn how…
Tutorial
Creating a reliable and scalable network diagram is one of the most critical tasks for any network security engineer. Before touching a…
Available for security consulting, network architecture projects, and full-time opportunities.
Whether you need a firewall migration, network security audit, or want to discuss a new role — I'm ready to talk.
