Chang Hee Jun
Doncaster
Summary
Senior ICT professional with 20+ years of expertise in network design, infrastructure management, and ICT service delivery across complex, multi-site organisations. Proven track record in financial planning, budget management, secure network deployment, and supplier coordination. Extensive experience with WAN/LAN architecture, network security, Microsoft enterprise technologies, cloud services (AWS, Azure), and ICT project delivery. Skilled in strategic planning, site mobilisation, and maintaining operational excellence while managing stakeholder relationships and ensuring compliance with service level agreements.
Overview
23
23
years of professional experience
1
1
Certification
Work History
Senior ICT & Security Officer
Industry Fund Services
07.2024 - Current
- Collaborate with tendering teams to prepare accurate cost estimates and allocate budgets for major project sites
- Manage ICT procurement processes and vendor contracts to ensure cost-effective service delivery
- Design and deploy secure LAN/WAN networks for new site setups, ensuring optimal performance and security
- Configure and maintain switches, routers, UPS devices, and wireless access points across multiple locations
- Implement network security measures including firewalls, IDS/IPS, and VPN solutions
- Configure and maintain communications equipment, specialist applications, and video conferencing systems (Teams Phone, Yealink meeting systems)
- Build and deploy SOE images through Microsoft Intune for new device rollouts
- Perform device audits and reconciliations using Microsoft Intune for endpoint management
- Support audiovisual systems and meeting-room technologies across the organisation
- Provide advanced technical support and resolve complex ICT issues promptly, maintaining 98% user satisfaction
- Serve as senior escalation point for managed service providers and technical vendors
- Deliver onsite technical support for staff and coordinate with remote service desk teams
- Manage relationship with managed service provider (Canon Business Solutions) ensuring quality standards and timely delivery
- Coordinate with technical vendors to resolve incidents and procure hardware/software solutions
- Monitor service level agreements and ensure contractual obligations are met
- Administer Microsoft technologies including Active Directory, Azure, Office 365, Exchange, Intune, and Entra ID
- Support AWS cloud infrastructure including servers, storage (Azure SQL), and virtualisation platforms
- Manage identity and access security including MFA, SSO, Conditional Access, and PAM
- Lead configuration hardening, patching, performance optimisation, and baseline compliance activities
- Monitor and manage cybersecurity controls using SIEM platforms (FortiSIEM, Microsoft Sentinel)
IT Technical Support Specialist
Jim’s IT
06.2023 - 07.2024
- Delivered remote and onsite technical support across 50+ diverse client environments in complex, multi-site organisations
- Deployed and managed endpoints using Microsoft Intune, performing device audits, compliance checks, and SOE builds
- Supported large-scale upgrades including OS migrations and premises relocation activities
- Installed, configured, and troubleshot LAN/WAN equipment including routers, switches, firewalls, controllers, and WAPs
- Monitored and optimised network performance, routing, throughput, and latency across multiple sites
- Provided support for VPN access, secure remote connectivity, and firewall configuration
- Maintained network security through IDS/IPS, antivirus, and security monitoring tools
- Maintained Active Directory including user accounts, Group Policy, DNS, and DHCP across multiple domains
- Supported installation and configuration of servers, specialist applications, and communication systems
- Coordinated with third-party vendors to resolve incidents and procure hardware/software
- Provided cost estimates for client projects and managed equipment procurement budgets
Senior IT & Facility Manager
ZOI Education & INUS English College
06.2011 - 12.2022
- Successfully managed IT team of 20 professionals, delivering projects on time and within budget
- Managed annual IT budget exceeding $2M, achieving 15% cost reduction through strategic resource allocation and process automation
- Evaluated organisation's technology use and needs; recommended improvements to hardware, software, and infrastructure
- Coordinated and implemented new IT projects and initiatives to meet departmental goals
- Designed and maintained enterprise network infrastructure across multiple campus locations
- Managed backup, security, and user support systems ensuring 99.8% uptime
- Developed disaster recovery plans and maintained business continuity procedures
- Improved customer service satisfaction levels by 35% through innovative strategies and process improvements
Regional Operation Manager
Ericsson Australia
08.2005 - 01.2011
- Managed warranty and SLA delivery ensuring contractual commitments met 99%+ target across regional accounts
- Monitored and reported Customer Network In-Service Performance (ISP) against predetermined targets
- Managed cost forecasting and budget tracking to achieve agreed profitability targets
- Served as main customer interface for Ericsson services, maintaining strong client relationships
- Established quality assurance standards and processes to optimise customer satisfaction levels
- Collaborated with stakeholders to develop long-term strategic plans for business growth
Telecommunication Core Network Engineer
Samsung Telecommunication Australia
01.2003 - 06.2005
- Designed data communications networks including WAN/LAN connectivity, routers, firewalls, and VPNs
- Provided warranty services and O&M technical support for VMS, MSC, 2G, and 1X CDMA network systems
- Monitored and analysed network performance to detect problems and perform capacity planning
- Participated in network technology upgrade and expansion projects including hardware installation and integration testing
- Developed comprehensive disaster recovery plans and tested regularly to ensure effectiveness
Education
Bachelor - Network and Computing
Swinburne University of Technology
Skills
- Network & Infrastructure: LAN/WAN Design & Deployment, Network Security, Routers/Switches/Firewalls, VPN, Wireless Access Points, Network Performance Monitoring, Capacity Planning
- Microsoft Technologies: Active Directory, Office 365, Azure, Group Policy, DNS/DHCP, Exchange, Intune, Entra ID, Server Administration
- Cloud & Virtualisation: AWS Cloud Services, Azure Infrastructure, VMware, Hyper-V, Citrix Environments, Cloud Migration
- Communications & Collaboration: VoIP Systems, Video Conferencing, Teams Phone, Yealink, Unified Communications, Mobile Device Management
- ICT Management: Budget Planning & Cost Estimation, Project Management, Supplier & Subcontractor Management, SLA Management, Multi-site ICT Support, Technical Documentation
- Security & Compliance: Firewall Configuration, Network Security, EDR, SIEM (FortiSIEM, Sentinel), Vulnerability Management, ISO 27001, Essential Eight
- Operating Systems: Windows Server, Windows 10/11, macOS, Linux
- Networking: Cisco, Fortinet, VPN, VLAN, TCP/IP, DNS, DHCP
- Cloud Platforms: AWS (EC2, S3, RDS), Microsoft Azure
- Virtualisation: VMware, Hyper-V
- Security Tools: FortiSIEM, Microsoft Sentinel, Tenable, Zscaler, Mimecast, Defender XDR
- Device Management: Microsoft Intune, MDM Solutions
- Communications: VoIP, Teams Phone, Yealink, Video Conferencing
Certification
- ITIL 4 Fundamentals – Essentials of IT Service Management
- Microsoft Certified Professional (MCP)
- Cisco Certified Network Associate (CCNA)
- Project Management Fundamentals: APM-PFQ
- PRINCE2 & Agile PM Overview
- Ericsson Quality Assurance System Implementation
Languages
Korean (Native)
Japanese (Beginner)
Timeline
Senior ICT & Security Officer
Industry Fund Services
07.2024 - Current
IT Technical Support Specialist
Jim’s IT
06.2023 - 07.2024
Senior IT & Facility Manager
ZOI Education & INUS English College
06.2011 - 12.2022
Regional Operation Manager
Ericsson Australia
08.2005 - 01.2011
Telecommunication Core Network Engineer
Samsung Telecommunication Australia
01.2003 - 06.2005
Bachelor - Network and Computing
Swinburne University of Technology