(Ivan)

Cybersecurity Professional
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TryHackMe
Penetration Testing DFIR Kernel Development VAPT Reporting CVE Exploitation Healthcare IT
case studies

01CTF Writeups

projects

02Works

CyberGuard shield Live production

CyberGuard — cybersecurity awareness platform for every age group

✓ cyberguard.ivanthan.uk

Full-stack educational game with 58+ real-world missions across 4 age groups — from kids (phishing basics) to seniors (scam awareness). XP progression, hobby-matched scenarios, global leaderboard, badge system. Built vanilla JS + Supabase, deployed on Cloudflare Pages.

JavaScript Supabase Cloudflare Pages Game Design Live ✓
→ visit cyberguard.ivanthan.uk 📋 Portfolio archive

CTF Writeups & VAPT Portfolio

✓ 4 rooms · 13 findings

Curated CTF archive organised by primary skill. Each engagement ships five docs: README, writeup, beginner walkthrough, formal VAPT with CVSS 3.1 + MITRE ATT&CK, Q&A cheatsheet.

VAPT CVSS 3.1 MITRE ATT&CK
→ github.com/r3b3Lli0uskID
🧪 Home lab

Proxmox / Kali / n8n Lab

✓ Self-hosted · always on

Dell OptiPlex running Proxmox with Kali VM for pentest and malware analysis. n8n automation via Docker + Cloudflare Tunnel for secure remote access.

Proxmox Kali Docker
→ ongoing
💥 Training · Jan 2026

Corelan Heap Masterclass — Exploit Development

✓ Completed

Professional heap-exploitation training: heap overflow, use-after-free, heap spray, Windows binary exploitation with WinDbg. Delivered under the Redfacers programme.

Heap Exploitation WinDbg Assembly
→ verify credential
🏥 11 years

Healthcare IT Infrastructure

✓ SingHealth · MINDEF · Parkway

Windows Server 2008/2012/2019 (hardware + Hyper-V) for DICOM imaging. X-Ray, DR, CR, Ultrasound system deployments across Myanmar. Nessus scanning, OS hardening, PHI/HIPAA compliance.

DICOM / HL7 Nessus Hyper-V
→ career timeline below
career

03Journey

Sep 2023 — Sep 2025

Imaging IT Specialist

Parkway Hospitals Singapore

Managed critical radiology imaging infrastructure (Vue RIS/PACS, Infinitt CPACS) at 99% uptime. Supported secure rollout of clinical AI: Sensecare, Annalise, Teamplay. Authn/authz for 200+ radiology staff. DICOM transmission anomaly monitoring; patch management & vulnerability remediation.

Aug 2019 — Apr 2022

IT Specialist (RIS/PACS) — ASEAN

Philips Enterprise Diagnostic Informatics — APAC

Mission-critical healthcare IT for tier-1 clients: SingHealth and Singapore MINDEF. Nessus vulnerability scans and Windows OS hardening for RIS/PACS servers. Root-cause analysis for complex imaging system failures.

Nov 2018 — Jul 2019

IT Executive (RIS/PACS) — ASEAN

Carestream Health Singapore

RIS/PACS installation, L1/L2 support, and UAT management for radiology imaging systems.

Feb 2015 — Sep 2018

Project Manager & Senior Service Engineer

Biz-Partner Group — Myanmar

Led healthcare IT deployments from kick-off through client acceptance. Medical imaging equipment (DR, CR, X-Ray, Ultrasound) with EMR/PACS integration.

credentials

04Certifications

CEH — EC-Council
In Progress

Certified Ethical Hacker v13 (CEH)

EC-Council · 2025–Present
MAGES Institute of Excellence
Completed

Professional Certificate in Cybersecurity

MAGES Institute of Excellence · Sep 2025 – Apr 2026
Corelan RF
Completed

Heap Masterclass — Exploit Development

Corelan × Redfacers · Jan 2026
→ verify credential
Completed

Microsoft Certified Professional (MCP)

SQL Database Administration · Microsoft
Completed

MTA Windows Server Administration

Microsoft
let's talk

05Contact

Looking for a junior security analyst or penetration tester who brings 11 years of healthcare-IT discipline into offensive work? Let's talk.
ivan@ivanthan.uk→ LinkedIn↗ GitHub↗ TryHackMe↗ Resume→