Senior IT Infrastructure & Network Engineer

NETWORK EXPRESS COURIER SERVICES PTE LTD; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

NetworkExpress Courier Services Pte Ltd is seeking a hands-on IT Infrastructure & Network Engineer to own the internal IT infrastructure, network performance and vendor coordination. The role requires coordinating with outsourced IT/server providers, cloud telephony, ISPs and other tech partners to ensure stable day-to-day operations.

You will manage LAN/WAN, Windows Server and VoIP services, monitor network health, troubleshoot issues and document configurations and SOPs.

Qualifications

• Diploma or degree in IT or related discipline.
• 3–5 years hands-on IT infrastructure/network experience.
• Strong TCP/IP, DNS, DHCP, NAT, VLAN, routing and switching knowledge.
• Experience with firewalls, VPNs, WAN/Internet connectivity and QoS.
• Experience with Windows Server and RDS/RDP environments.
• Knowledge of virtualization (VMware/Hyper‑V).
• Understanding of VoIP, SIP, RTP, QoS and IP phones.
• Ability to diagnose packet loss, latency and congestion.
• Strong communication with external vendors and management.

Responsibilities

• Manage and monitor LAN/WAN, internet, Wi‑Fi, VLANs, switches, routers and firewall infra.
• Support and monitor Windows Server, RDS/RDP, AD, Group Policy and virtual machines.
• Troubleshoot network latency, jitter, packet loss, bandwidth and connectivity.
• Perform network diagnostics using Ping, Traceroute, MTR and Wireshark.
• Configure and monitor QoS for VoIP services.
• Support VoIP, SIP, IP phones and cloud telephony.
• Maintain network diagrams, IP inventories, and IT SOPs.
• Coordinate with outsourced IT vendors and service providers.
• Review vendors' findings and ensure proper resolution.
• Provide management with updates and IT infrastructure health reports.
• Support future upgrades and system integrations.

Skills

Networking fundamentals

TCP/IP, DNS, DHCP, NAT

LAN/WAN management

VoIP QoS

Windows Server & RDS

Active Directory & Group Policy

Virtualization (VMware/Hyper-V)

Firewall/VPN/WAN connectivity

Vendor coordination & communication

Network diagnostics (Ping/Traceroute/M

Wireshark & packet capture

Education

Diploma/Degree in IT or related

Tools

VMware

Hyper-V

Wireshark

Firewall management tools

Job description

NetworkExpress Courier Services Pte Ltd is seeking a hands-on IT Infrastructure & Network Engineer to own the internal IT infrastructure, network performance and vendor coordination. The role requires coordinating with outsourced IT/server providers, cloud telephony, ISPs and other tech partners to ensure stable day-to-day operations.

You will manage LAN/WAN, Windows Server and VoIP services, monitor network health, troubleshoot issues and document configurations and SOPs.