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supun Karunarathna

@supunkarunarathna

I monitor, investigate, and strengthen security operations across telecom and enterprise environments.

I've led security operations at SLT-MOBITEL, monitoring critical telecom infrastructure across 14 data centres with IBM QRadar and Security Onion.

I identified and mitigated more than 10 data-fraud and traffic-manipulation techniques, including HTTP injection methods, strengthening protection for core network services.

I've investigated suspected hacking and cyber incidents, supported legal and court proceedings with Sri Lanka CERT and government organisations, and managed vulnerability assessment, remediation tracking, and security audits.

Now at Unicorn IT Solutions in Melbourne, I deliver enterprise technical support while continuing to build practical cybersecurity capability through SME awareness training and university mentorship.

Experience

Work history, roles, and key accomplishments

Current

IT Support Engineer

Current

Unicorn IT Solutions Pty Ltd

Aug 2026 - Present (2 months)

Delivering technical support, troubleshooting, and IT service solutions across diverse enterprise customer environments, addressing operational issues and ensuring reliable, efficient, and secure technology services.

Technical Support Troubleshooting Incident resolution Hardware Software System Configuration Connectivity

Current

Cyber Security Trainer

Current

The Asia Foundation

Aug 2025 - Present (1 year 2 months)

Deliver cybersecurity awareness training to Small and Medium Enterprises under a Google funded APAC initiative, promoting secure digital practices and risk awareness.

Cyber Security Awareness Training Delivery Risk Awareness Digital Security

Current

Industrial Mentor

Current

University Peradeniya

Feb 2019 - Present (7 years 8 months)

Provide industry mentorship and professional guidance to university students, supporting the development of practical skills, career readiness, and industry-aligned knowledge through real-world insights, professional practices, and guidance on emerging technologies and industry expectations.

Mentorship Career Guidance Professional Development Industry Insights

Lead Security Analyst

SLT-MOBITEL (PVT) LTD

Feb 2024 - Feb 2026 (2 years)

Led network security operations across a large-scale telecom environment, with responsibility for security monitoring, SIEM operations, vulnerability management, fraud detection, information security governance, and incident investigations across critical mobile and wireless network infrastructure.

IBM QRadar Security Onion Microsoft Sentinel Vulnerability Assessment Threat Detection incident investigation Security Monitoring Fraud Detection Information Security Governance Log Analysis

Supervisory Engineer – Network Security Operations

SLT-MOBITEL (PVT) LTD

Feb 2023 - Dec 2023 (10 months)

Managed telecom core network operations with a focus on security monitoring, incident investigation, and threat detection across EPC and IMS infrastructure, ensuring network stability and rapid response to operational and security incidents.

Security Monitoring incident investigation Threat Detection Network Security EPC IMS Access Control Security Policies

Senior Engineer-Packet Switching & IMS

Hutchison

Sep 2021 - Jan 2023 (1 year 4 months)

Security Monitoring incident investigation Threat Detection Network Security EPC IMS Access Control Security Policies

Specialist Engineer – Mobile Core Network

Dialog Axiata PLC

May 2021 - Aug 2021 (3 months)

Managed mobile core network operations within a telecom environment, focusing on network monitoring, incident investigation, and analysing operational events across core infrastructure to maintain service availability and network stability.

Network Monitoring incident investigation Log Analysis Root Cause Analysis Cross functional Coordination Telecom Infrastructure