Senior System Administrator

EXCEL TALENT PTE. LTD.; Singapore; On-site; SGD 85,000 - 120,000; Full time

Job summary

EXCEL TALENT PTE. LTD. is seeking an experienced IT Infrastructure Administrator to design, implement, and maintain enterprise on-premises and cloud environments in Singapore.

You will ensure high availability, security, and disaster recovery readiness to support critical business operations. The role requires hands-on experience with Linux/Windows servers, virtualization (VMware/Hyper-V), cloud platforms (AWS/Azure), and strong networking fundamentals.

Qualifications

• Hands-on systems administration experience in medium-to-large enterprise environments.
• Deep knowledge of Linux/Unix or Windows Server operating systems, virtualization technologies (VMware/Hyper-V), and cloud platforms (AWS/Azure).
• Strong understanding of TCP/IP, DNS, DHCP, routing, switching, and VPN protocols.

Responsibilities

• Design, configure, and maintain on-premises and cloud servers, storage systems, and network devices to support enterprise IT operations.
• Monitor and analyze performance metrics (CPU, memory, storage, network traffic) to ensure system availability and proactively resolve issues
• Implement and manage firewalls, access controls, security patches, and vulnerability remediation to protect IT infrastructure
• Oversee data backup solutions and conduct disaster recovery testing to ensure business continuity and data integrity

Skills

Systems administration

Linux/Unix

Windows Server

Virtualization (VMware/Hyper-V)

Cloud platforms (AWS/Azure)

Networking: TCP/IP, DNS, DHCP

Security patching & vulnerability mgmt

Education

Bachelor’s degree

Job description

Job Summary

Design, configure, and maintain enterprise on-premises and cloud infrastructure to ensure high availability, security, and business continuity.

Responsibilities

• Design, configure, and maintain on-premises and cloud servers, storage systems, and network devices to support enterprise IT operations
• Monitor and analyze performance metrics (CPU, memory, storage, network traffic) to ensure system availability and proactively resolve issues
• Implement and manage firewalls, access controls, security patches, and vulnerability remediation to protect IT infrastructure
• Oversee data backup solutions and conduct disaster recovery testing to ensure business continuity and data integrity

Required competencies and certifications

• Hands-on systems administration experience in medium-to-large enterprise environments
• Deep knowledge of Linux/Unix or Windows Server operating systems, virtualization technologies (VMware/Hyper-V), and cloud platforms (AWS/Azure)
• Strong understanding of TCP/IP, DNS, DHCP, routing, switching, and VPN protocols

Preferred competencies and qualifications

• Bachelor’s degree in Computer Science, Information Systems, or equivalent practical work experience