Lead Systems & Infrastructure Engineer

APBA TG Human Resource Pte Ltd; Singapore; On-site; SGD 72,000 - 96,000; Full time

Job summary

APBA TG Human Resource Pte Ltd in Singapore is seeking a seasoned Systems Administrator to maintain and support servers, endpoints, and network devices across Windows and Linux environments.

You will ensure uptime, perform preventive maintenance, manage AD, virtualization (VMware/Hyper-V), monitor health, respond to incidents, and collaborate with vendors and users to keep critical systems secure and compliant.

Qualifications

• Minimum 5 years of experience in system administration or infrastructure support.
• Hands-on experience with Windows/Linux Servers, Active Directory, and VMware or Hyper-V.
• Strong troubleshooting skills in server, hardware, software, and network environments.
• Knowledge of system monitoring, patching, backup, and cybersecurity best practices.

Responsibilities

• Maintain and support servers, endpoints, and network devices.
• Perform routine maintenance on hardware.
• Manage operating systems (Windows, Linux, virtual environments).
• Ensure uptime and service continuity for critical systems.
• Conduct scheduled system checks, updates, and patching.
• Monitor system health, logs, and alerts (CPU, memory, disk, network).
• Perform backup verification and restoration testing.
• Prevent system failures through capacity monitoring and early detection.
• Diagnose and resolve hardware, software, and network issues.
• Provide Level 1-3 technical support depending on role seniority.
• Respond to incidents, outages, and system degradation.
• Perform root cause analysis and implement permanent fixes.
• Apply security patches, antivirus updates, and system hardening.
• Monitor for security threats, vulnerabilities, and unauthorized access.
• Manage user accounts, roles, and permissions (AD, IDMS systems).
• Support security audits and compliance requirements.
• Configure and maintain Active Directory / Domain Services.
• Administer virtualization platforms (VMware, Hyper-V, cloud VMs).
• Deploy and configure standard software and applications.
• Maintain system configurations and baseline standards.
• Maintain asset inventory and lifecycle records.
• Update system documentation, network diagrams, and SOPs.
• Record incidents, changes, and maintenance activities.
• Support change implementation and system upgrades.
• Assist in system migrations and technology refresh projects.
• Identify recurring issues and propose improvement solutions.
• Optimize system performance and operational efficiency.
• Coordinate with hardware, software, and service providers.
• Support warranty claims, repairs, and service contracts.
• Evaluate vendor solutions and technical proposals.
• Monitor vendor performance and SLA compliance.
• Provide user training and technical guidance.
• Support business operations requiring system availability.
• Participate in standby, on-call, or shift support (role-dependent).
• Communicate issues and resolutions clearly to stakeholders.

Skills

Windows

Linux

Networking

Troubleshooting

Security

Education

Bachelor's degree in IT

Tools

Active Directory

VMware

Hyper-V

Job description

APBA TG Human Resource Pte Ltd in Singapore is seeking a seasoned Systems Administrator to maintain and support servers, endpoints, and network devices across Windows and Linux environments.

You will ensure uptime, perform preventive maintenance, manage AD, virtualization (VMware/Hyper-V), monitor health, respond to incidents, and collaborate with vendors and users to keep critical systems secure and compliant.