Senior IT Infrastructure Engineer

Kerry Consulting; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Kerry Consulting in Singapore is seeking a Senior IT Infrastructure Engineer to support and strengthen its IT infrastructure, system administration, network, and day-to-day technology operations.

You will manage Microsoft 365 (Entra ID, Exchange Online, Teams, SharePoint), monitor networks, maintain documentation, handle incidents, and contribute to security and continuous improvement.

Qualifications

• Diploma in IT with 5+ years hands-on IT infrastructure and end-user support.
• Experience administering Microsoft 365 including Entra ID and IAM activities.
• Strong troubleshooting and problem solving with security awareness.

Responsibilities

• Administer Microsoft 365 environment (Entra ID, Exchange Online, Teams, SharePoint).
• Monitor network performance, manage firewalls, VPN, and incident escalation.
• Maintain asset inventories, documentation, and support tickets; assist projects.

Skills

Microsoft 365

End-user support

Networking

Troubleshooting

Security

Education

Diploma in IT

Tools

Microsoft Entra ID

Exchange Online

Teams

SharePoint

Firewalls

VPN

SSO

Job description

Overview

A leading Infrastructure & Engineering organization is seeking a Senior IT Infrastructure Engineer to support and strengthen its IT infrastructure, system administration, network, and day-to-day technology operations.

Responsibilities

You will administer the Microsoft 365 environment, including Microsoft Entra ID, Exchange Online, Teams, and SharePoint, while managing user accounts, licenses, permissions, MFA, privileged access, and security alerts. You will support the full employee account lifecycle from onboarding through offboarding and maintain accurate system and operational documentation.

The role also covers the administration and monitoring of firewalls, switches, Wi‑Fi, VPN connectivity, and wider network infrastructure, including vendor coordination when incidents arise. You will monitor network availability and performance, review security and endpoint protection alerts, track patch compliance and device health, and perform initial investigation and escalation of security incidents.

In addition, you will maintain IT asset inventories and network diagrams, manage IT support tickets and vendor cases, and support infrastructure projects and continuous improvements.

Requirements

You should have a Diploma or equivalent qualification in Information Technology or a related discipline, with at least 5 years of hands‑on experience in IT infrastructure and end‑user support. Practical experience administering Microsoft 365 is essential, including Microsoft Entra ID and related identity and access management activities.

You should have sound networking knowledge and experience working with firewalls, including areas such as VPN and SSO, together with exposure to endpoint management and security. The role requires strong troubleshooting and problem‑solving capabilities, with the ability to investigate issues systematically, identify root causes, and develop practical recommendations for management consideration.

License No: 16S8060 / Registration No: R26161178