(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 · free forever

CyberGuard — cybersecurity awareness platform for every age group

✓ cyberguard.ivanthan.uk

Scammers don't check your age. They hit kids on their first phone and seniors on their pension WhatsApp with the same playbook. CyberGuard is a free, gamified platform that turns security awareness into something your whole family actually wants to play.

58+
Real missions
4
Age groups
$0
Forever free
No
Sign-up

Pick your age group — Kids, Teens, Adults, or Seniors — and play through missions built from actual scams circulating right now. Scenarios match your hobbies (gamers get gaming scams, grandparents get pension cons), so the lessons stick. Earn XP, unlock badges, climb the global leaderboard.

No downloads. No logins. Open the link on any device and start protecting the people you love in under 30 seconds.

JavaScript Supabase Cloudflare Pages Game Design Live ✓
→ play free at 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 REDFACE Research 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 × REDFACE Research · 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→