Network Administrator – HPC Managed Services

PTC System (S) Pte Ltd; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

PTC System (S) Pte Ltd in Singapore seeks a proactive Network Administrator to manage the HPC fabric and data centre switching infrastructure, ensuring reliability, performance and security across the environment.

You will collaborate with system, storage and security teams, participate in 24x7 on-call rotations, and maintain runbooks, aligning with ITIL practices to support seamless HPC operations.

Qualifications

• Two years or more of network support experience in HPC or enterprise environments.
• Hands-on with data centre switching, SDN, firewalls and VPN administration.
• Strong knowledge of TCP/IP, VLANs, OSPF and BGP networking.
• Familiarity with network monitoring tools (SolarWinds, Nagios, Zabbix).
• Excellent communication and teamwork abilities.

Responsibilities

• Operate and maintain tenant HPC fabric and data centre switching infrastructure.
• Perform network configuration backups and capacity/utilization reporting.
• Troubleshoot Layer 2/3 connectivity, routing and switching faults.
• Support SDN, firewalls and VPN solutions.
• Collaborate with system, storage and security teams for optimal HPC performance.
• Participate in 24x7 on-call rotation for P1/P2 incident escalation.
• Maintain detailed network docs, runbooks and change records per ITIL.

Tools

SolarWinds

Nagios

Zabbix

Job description

Role Overview

We are seeking a proactive and skilled Network Administrator to join our High-Performance Computing (HPC) Managed Servicesteam. The successful candidate will be responsible for maintaining thehigh-performance network fabric that supports HPC operations, ensuring reliability, performance, and security across data centre environments.

Key Responsibilities

• Operate and maintain tenant HPC fabric and data Centre switching infrastructure, including configuration, monitoring, and performance tuning.
• Perform network configuration backup, capacity/utilization reporting, and ensure operational compliance with standards.
• Troubleshoot and resolve network issues, including Layer 2/3 connectivity problems, routing, and switching faults.
• Support and administer Software-Defined Networking (SDN), firewalls, and VPN solutions.
• Collaborate with system, storage, and security teams to ensure seamless data flow and optimal HPC cluster performance.
• Participate in the 24x7 on-call rotation for P1/P2 incident escalation and resolution support.
• Maintain detailed network documentation, operational runbooks, and change management records in alignment with ITIL practices.

Requirements

• At least two (2) years of relevant experience in network support, monitoring, and troubleshooting in enterprise or HPC environments.
• Hands-on experience with data Centre switching, SDN technologies, firewalls, and VPN administration.
• Strong understanding of TCP/IP, VLANs, routing protocols (OSPF, BGP), and network security concepts.
• Familiarity with network management and monitoring tools (e.g., SolarWinds, Nagios, Zabbix, or equivalent).
• Solid analytical and problem-solving abilities; able to respond effectively under pressure.
• Excellent communication and teamwork skills.

Minimum Certification Requirements

• ITIL Foundation (or equivalent or higher).
• CCNA (Cisco Certified Network Associate) or equivalent or higher certification.