Senior System Engineer (Wintel + Linux) - Bank - Up to 60kpm

About the role

To support, maintain, and enhance the Bank's server and infrastructure platforms, ensuring high availability, security, performance, and resilience across data centre, cloud, and branch environments.

Key responsibilities

• Provide day-to-day operational support for Windows and Linux server infrastructure.
• Manage and maintain Microsoft Windows Server, Active Directory, DNS, DHCP, Group Policy, and related infrastructure services.
• Administer Microsoft Exchange, WSUS, and server patch management processes.
• Support and maintain data centre infrastructure, including servers, virtualisation platforms, storage, and backup solutions.
• Perform system monitoring, troubleshooting, performance tuning, and root cause analysis.
• Execute infrastructure changes, upgrades, patching, and technology refresh activities.
• Support hybrid infrastructure connectivity between on-premises and cloud environments.
• Work closely with IT Security on vulnerability remediation, security hardening, and compliance initiatives.
• Maintain infrastructure documentation, technical procedures, and operational standards.
• Participate in after-hours maintenance and on-call support as required.

About you

• Bachelor's Degree in Computer Science, Information Technology, or a related discipline.
• Minimum 5 years of relevant experience in system administration and infrastructure support.
• Experience managing and maintaining Microsoft Windows Server platforms, including Active Directory, GPO, Exchange, WSUS, and related infrastructure services.
• Experience in Linux server administration (e.g. Red Hat) in production environments.
• Experience with VMware, Hyper-V, or other enterprise virtualisation platforms, storage, backup, and disaster recovery solutions.
• Experience supporting enterprise data centre environments.
• Experience in banking, financial services, or other regulated industries.
• Good command of spoken and written English and Chinese (Cantonese and Mandarin).
• Proficient in Python and/or Shell scripting for automation.
• Familiar with Microsoft 365, Entra ID, Exchange Online, and infrastructure monitoring tools.