IT System Engineer — Infrastructure & Security Specialist

Adecco (Portugal); Hong Kong; On-site; HKD 420,000 - 640,000; Full time

Job summary

Adecco is seeking an experienced IT System Engineer to support and maintain our IT infrastructure, systems, networks, and cybersecurity environment in Hong Kong. The role requires hands-on server and system administration across Windows Server, Linux, and macOS, with AD, GPO, and network skills.

You will manage day-to-day operations, monitor systems, and help with security, backups, and documentation. Collaboration with vendors and potential web development tasks are included.

Qualifications

• Bachelor's degree in CS/IT/CE or related field.
• 3–6 years of hands-on IT experience.
• Hands-on with server infrastructure and cybersecurity.
• Experience in system administration and network support.
• Experience administering Active Directory and Group Policy.
• Knowledge of TCP/IP, DNS, DHCP, VPN, switches/routers.
• Experience with data backup and recovery.
• Strong cybersecurity principles and vulnerability management.
• Fluent in Cantonese, Mandarin, and English.

Responsibilities

• Manage, troubleshoot Windows Server, Linux, and macOS environments.
• Perform day-to-day system administration, server monitoring, configuration, maintenance, and troubleshooting.
• Administer and maintain Active Directory, including user accounts, permissions, access control, and Group Policy.
• Support network infrastructure (LAN/WAN, TCP/IP, DNS, DHCP, VPN, switches, routers, firewalls).
• Monitor IT infrastructure and implement cybersecurity measures to protect systems and data.
• Support security-related activities: access management, patching, endpoint protection, incident triage.
• Manage and monitor data backup and recovery processes.
• Troubleshoot hardware, software, server, network, and connectivity issues.
• Assist with system upgrades, migrations, and infrastructure projects.
• Provide technical support to users and liaise with external IT vendors.
• Assist with web development and website/system maintenance.
• Maintain technical documentation and IT operational procedures.

Skills

Troubleshooting

Communication

Cantonese

Mandarin

English

Education

Bachelor's degree in Computer Science, Information Technology, Computer Engineering, or related discipline

Tools

Windows Server

Linux

macOS

Active Directory

Group Policy

DNS

DHCP

VPN

Firewalls

Backup/Recovery

Job description

Adecco is seeking an experienced IT System Engineer to support and maintain our IT infrastructure, systems, networks, and cybersecurity environment in Hong Kong. The role requires hands-on server and system administration across Windows Server, Linux, and macOS, with AD, GPO, and network skills.

You will manage day-to-day operations, monitor systems, and help with security, backups, and documentation. Collaboration with vendors and potential web development tasks are included.