Network Administrator - HPC Managed Services

PTC SYSTEM (S) PTE LTD; Singapore; On-site; SGD 70,000 - 90,000; Full time

Job summary

PTC SYSTEM (S) PTE LTD in Singapore is seeking a proactive Network Administrator to join our HPC Managed Services team. You will maintain the high-performance network fabric that supports HPC operations, ensuring reliability, performance, and security across data centre environments.

Responsibilities include operating and maintaining HPC fabric, SDN, firewalls, VPNs, and collaborating with system, storage, and security teams.

Qualifications

• Minimum 2 years in network support, monitoring and troubleshooting in enterprise or HPC.
• Hands-on experience with data centre switching, SDN, firewalls, and VPN administration.
• Strong TCP/IP, VLANs, OSPF/BGP, and network security knowledge.

Responsibilities

• Operate and maintain HPC fabric and data centre switching infrastructure.
• Perform backups, capacity reporting, and compliance with standards.
• Troubleshoot Layer 2/3 connectivity, routing, and switching faults.
• Support SDN, firewalls, and VPN solutions.
• Maintain runbooks and change records per ITIL.
• Participate in 24x7 on-call rotation for incident resolution.

Skills

Network troubleshooting

TCP/IP

VLANs

Routing (OSPF/BGP)

Security concepts

Communication skills

Education

CCNA certification

ITIL Foundation

Tools

SolarWinds

Nagios

Zabbix

SDN technologies

Firewalls

VPN administration

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 24×7 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.