System & Network Engineer

CENTRICS NETWORKS PTE. LTD.; Singapore; On-site; SGD 60,000 - 100,000; Full time

Job summary

CENTRICS NETWORKS PTE. LTD. is seeking an IT Infrastructure professional to design, implement, and manage virtualization, Windows Server, Active Directory, DNS/DHCP, and security services in a dynamic environment.

You will monitor, patch, back up data, perform DR testing, and collaborate with vendors and internal teams to ensure high availability and reliable IT operations.

Qualifications

• Design, configure, and maintain virtualized environments (KVM/VMware/Hyper‑V) with high availability.
• Manage Windows Server infrastructure including AD lifecycle, GPO deployment, DNS, DHCP.
• Provision, monitor, and troubleshoot LAN/WAN topologies, VPNs, subnets, and edge firewalls.
• Execute patching, firmware updates, OS upgrades, and continuous performance monitoring.
• Administer automated backups, test disaster recovery (DR) protocols, and ensure rapid business continuity execution.
• Deliver Level 2/3 troubleshooting for complex hardware, software, and network issues with vendors and internal teams.
• Create and update SOPs, network diagrams, and infrastructure inventory logs.

Responsibilities

• Virtualization & Infrastructure: Design, configure, and maintain virtualized environments for optimal resource allocation and high availability.
• Systems Administration: Manage Windows Server infrastructure, Active Directory lifecycle, GPO deployment, DNS/DHCP.
• Network & Security Operations: Provision, monitor, and troubleshoot LAN/WAN, VPNs, subnets, and edge firewalls.
• Maintenance & Reliability: Patch management, firmware updates, OS upgrades, and continuous performance monitoring.
• Data Protection & BCP: Administer automated backup routines, test DR protocols, ensure rapid business continuity.
• Support & Vendor Management: Level 2/3 troubleshooting for hardware/software/network issues; coordinate with vendors.
• Documentation: Create and update SOPs, network diagrams, and infrastructure logs.

Tools

VMware vSphere/vCenter

Microsoft Hyper‑V

Windows Server (2016/2019/2022)

Active Directory

DNS

DHCP

GPO

Fortinet

Palo Alto

CheckPoint

Cisco

IPsec/SSL VPNs

Veeam Backup & Replication

Windows Server Backup

PRTG

Nagios

LogicMonitor

Opsview/OpsRamp

Zabbix

SolarWinds

Azure

AWS

Entra ID / Azure AD

PowerShell

Job description

Core Responsibilities

• Virtualization & Infrastructure: Design, configure, and maintain Virtualized (KVM/VMware/Hyper‑V) environments, ensuring optimal resource allocation and high availability.

• Systems Administration: Manage Windows Server infrastructure, including Active Directory lifecycle management, Group Policy (GPO) deployment, and core network services (DNS, DHCP).

• Network & Security Operations: Provision, monitor, and troubleshoot LAN/WAN topologies, site-to-site and remote-access VPNs, subnets, and edge firewalls.

• Maintenance & Reliability: Execute patch management, firmware updates, OS upgrades, and continuous performance monitoring to meet uptime SLAs.

• Data Protection & BCP: Administer automated backup routines, test disaster recovery (DR) protocols, and ensure rapid business continuity execution.

• Support & Vendor Management: Deliver Level 2/3 troubleshooting for complex hardware, software, and network issues while coordinating with external vendors and internal teams on IT projects.

• Documentation: Create and update standard operating procedures (SOPs), network diagrams, and infrastructure inventory logs.

Key Required & Added Technical Skillsets

• Virtualization: VMware vSphere/vCenter, Microsoft Hyper‑V

• Operating Systems & Directory Services: Windows Server (2016/2019/2022), Active Directory, DNS, DHCP, GPO

• Networking & Security: VLANs, Subnetting, Routing/Switching, Firewalls (Fortinet/Palo Alto/CheckPoint/Cisco), VPNs (IPsec/SSL)

• Backup & DR: Veeam Backup & Replication, Windows Server Backup, DR testing methodologies

• Monitoring & Alerts: PRTG, Nagios, LogicMonitor, Opsramp, Zabbix, or SolarWinds

• Cloud & Hybrid Basics: Fundamental experience with Azure or AWS (Hybrid Active Directory / Entra ID integration)

• Scripting & Automation: Basic PowerShell scripting for administrative task automation