(Senior) System Engineer – Windows & Linux
Purpose :
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.
Job Roles & 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.
Skills & Qualifications:
Bachelor's Degree in Computer Science, Information Technology, or a related discipline.
Microsoft certifications are preferred.
Certifications in Linux, Cloud, Cybersecurity, or DevOps technologies would be an advantage.
Minimum 5 years of relevant experience in system administration and infrastructure support.
Manage and maintain 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 is preferred.
Good command of spoken and written English and Chinese.
Fluency in Cantonese is required.
Proficient in Python and/or Shell scripting for automation.
Familiar with Microsoft 365, Entra ID, Exchange Online, and infrastructure monitoring tools.
Knowledge of cloud platforms and infrastructure automation tools (e.g. Ansible, Terraform) is an advantage.
Strong analytical and problem-solving skills.
Able to work independently in a mission-critical production environment.
Good communication and stakeholder management skills.
Strong sense of responsibility, ownership, and process compliance.
Willing to participate in after-hours support and maintenance activities.