System and Network Engineer (IT Infrastructure)

Adventus Singapore; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

Adventus Singapore is seeking a hands-on IT System Administrator to manage core infrastructure, virtualization, and Windows Server environments.

You will design, implement, and troubleshoot network infrastructure, monitor performance, perform upgrades, and support backup and DR plans.

The role requires 2–4 years of relevant experience, a Diploma or Degree in IT, and strong communication as you collaborate with vendors and internal teams.

Qualifications

• Diploma or Degree in Information Technology or related field.
• Minimum 2–4 years of relevant experience in system and network administration.
• Hands-on experience with Hyper-V and/or VMware virtualization platforms, Windows Server including AD, DNS, DHCP, and Group Policy.

Responsibilities

• Manage and maintain virtualization platforms (Hyper-V and VMware)
• Administer and support Windows Server environments
• Design, implement, and troubleshoot network infrastructure (LAN/WAN, VPN, firewall)
• Monitor system performance and ensure high availability of IT services
• Perform system upgrades, patching, and routine maintenance
• Troubleshoot hardware, software, and network issues
• Support backup, disaster recovery, and business continuity processes
• Maintain proper documentation of systems, configurations, and procedures
• Collaborate with internal teams and vendors for project implementation and support

Skills

Hyper-V

VMware

Windows Server

Active Directory

DNS

DHCP

Group Policy

Firewall

Education

Diploma/Degree in IT

Tools

Zscaler

Cisco ISE

FortiNAC

Azure

Job description

Adventus is an Information and Communications Technology (ICT) Solutions and Services Provider with a wide footprint across the globe.

We help organizations bring about positive transformation to their businesses by leveraging intelligent applications of innovative solutions and pertinent services to remain winners in today's ultra-competitive marketplace.

With our strong network of technology partners, excellent domain expertise and differentiated value proposition, we are able to go above and beyond for our customers, far exceeding expectations.

Job Responsibilities

• Manage and maintain virtualization platforms (Hyper-V and VMware)

• Administer and support Windows Server environments

• Design, implement, and troubleshoot network infrastructure (LAN/WAN, VPN, firewall)

• Monitor system performance and ensure high availability of IT services

• Perform system upgrades, patching, and routine maintenance

• Troubleshoot hardware, software, and network issues

• Support backup, disaster recovery, and business continuity processes

• Maintain proper documentation of systems, configurations, and procedures

• Collaborate with internal teams and vendors for project implementation and support

Job Requirements

• Diploma or Degree in Information Technology, Computer Science, or related field

• Minimum 2–4 years of relevant experience in system and network administration

• Hands-on experience with:

  • Hyper-V and/or VMware virtualization platforms

  • Windows Server (Active Directory, DNS, DHCP, Group Policy)

  • Network infrastructure (switching, routing, firewall)

Preferred / Added Advantage

• Experience with Zscaler (ZIA/ZPA)

• Experience with Network Access Control (NAC) solutions (e.g., Cisco ISE, FortiNAC)

• Familiarity with Microsoft Azure (IaaS, networking, identity)

• Knowledge of security best practices and frameworks

• Relevant certifications (e.g., Microsoft, VMware, Cisco, Azure)

Key Skills

• Strong troubleshooting and problem-solving skills

• Good understanding of IT infrastructure and security concepts

• Ability to work independently and in a team

• Good communication and documentation skills