Nuwara Eliya, Sri Lanka

Hello, I'm

Rathakrishnan Nagilan

Network Security Specialist

I design, secure and troubleshoot the networks other people depend on — Cisco routing & switching, network defense, and hands-on vulnerability assessment. Currently reading for a Level 5 Pearson BTEC HND in Computing and preparing for CCIE.

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01

Profile

Passionate Software Engineering Undergraduate and Network Security Specialist experienced in Cisco routing & switching, network defense, ethical hacking and vulnerability scanning.

My day-to-day has been the unglamorous, essential end of networking: recovering switches that will not boot, segmenting campus traffic with VLANs, and scanning web services for the flaws nobody wants to find in production. I am currently pursuing a Level 5 Pearson BTEC HND in Computing and preparing for CCIE certification.

Location
Nuwara Eliya, Sri Lanka
Focus
Routing, switching & network defense
Studying
Level 5 Pearson BTEC HND in Computing
Next
CCIE certification

02

Capabilities

  • Networking

    Building and tuning the routed and switched core.

    • VLAN Configuration
    • Cisco IOS
    • BGP
    • OSPF
    • EIGRP
    • HSRP
    • IPsec VPNs
    • QoS
    • Load Balancing

  • Security

    Finding the weaknesses before somebody else does.

    • Network Defense
    • Vulnerability Scanning
    • Burp Suite
    • Penetration Testing
    • Ethical Hacking

  • Systems & Admin

    The platforms the network actually serves.

    • Kali Linux
    • Windows Server
    • VMware
    • Microsoft SQL Server
    • PuTTY
    • SSH

03

Experience

  1. 2023 — Jan 2025

    Junior Network Technician / Trainee Administrator

    Active Tech Networks (ATN Campus), Sri Lanka

    • Managed Cisco routers and switches, resolving IOS boot failures using TFTP and USB recovery.
    • Configured VLANs to segment and stabilise campus traffic.
    • Performed vulnerability scans with Burp Suite and reported remediation steps.
    • Optimised campus network topologies for reliability and throughput.

04

Certifications

Select a certificate to view it full size.

  • Cisco Certified Internetwork Expert (CCIE) In progress Studying now — certificate to follow

05

Get in touch

Open to network engineering and security roles, internships and collaboration.

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