Lead System Administrator

KERRY CONSULTING PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Kerry Consulting Pte. Ltd. in Singapore seeks a Lead System Administrator to own the Microsoft Exchange environment, including on-premises and Exchange Online, and to drive migrations to Microsoft 365.

You will work with global teams across IAM and workplace technology, taking responsibility for messaging administration and automation. The role requires hands-on expertise in Entra ID, Azure, Windows Server, and PowerShell, with a focus on secure and reliable enterprise messaging.

Qualifications

• Hands-on experience managing on-premises Microsoft Exchange (preferably 2019/Subscription Edition).
• Experience planning and executing migrations to Exchange Online / Microsoft 365.
• Solid knowledge of Entra ID, Azure, Microsoft 365, Windows Server, AD, GPO, DNS/DHCP, and PowerShell.

Responsibilities

• Administer and support on-premises Exchange environment (Exchange 2019 / Subscription Edition) and Exchange Online; manage mail flow, mailbox administration, distribution groups, and licensing.
• Plan and deliver migrations from on-premises Exchange to Exchange Online / Microsoft 365, including hybrid coexistence and cutover activities.
• Support messaging-related activities across Entra ID and Azure, integrate with SSO and federation technologies; maintain core Windows infrastructure and automate tasks with PowerShell.

Skills

Microsoft Exchange

Exchange Online

Microsoft 365

Azure

PowerShell

Active Directory

Group Policy

Windows Server

Tools

AD Connect

PowerShell

Job description

Overview

A leading global organization in the Financial Services industry is looking for a Lead System Administrator to be based in Singapore. This is a hands-on infrastructure role with a strong focus on Microsoft Exchange Server, Exchange Online, Microsoft 365, Azure, and Entra ID, supporting a secure and reliable enterprise environment. You will work closely with the global teams across infrastructure, IAM, and workplace technology, with particular ownership of Microsoft messaging administration and Exchange migration activities.

Responsibilities

You will administer and support the organization's on-premises Microsoft Exchange environment (Exchange 2019 / Subscription Edition) and Exchange Online, taking responsibility for day-to-day administration, troubleshooting, mail flow, mailbox management, distribution groups, and licensing. A key part of the role will be planning and delivering migrations from on-premises Exchange to Exchange Online / Microsoft 365, including hybrid coexistence and cutover activities.

You will also support messaging-related activities across Microsoft Entra ID and Azure, including integration with SSO and federation technologies such as OIDC, OAuth 2.0, and SAML, while partnering with the relevant IAM and workplace teams. Beyond messaging, you will maintain core Windows infrastructure including Windows Server, Active Directory, Group Policy, DNS, DHCP, and AD Connect, support incident and change management, maintain security and audit readiness, and use PowerShell to automate routine administration.

Requirements

You should bring strong, hands-on experience administering on-premises Microsoft Exchange, ideally Exchange 2019 or Subscription Edition, together with direct experience planning and executing migrations to Exchange Online / Microsoft 365. This should include practical ownership of Exchange administration and migration activities rather than solely providing project or troubleshooting support.

Experience supporting an in-house enterprise IT environment and its end users is important, along with solid knowledge of Microsoft Entra ID, Azure / Azure Stack, Microsoft 365, Windows Server, Active Directory, GPO, DNS/DHCP, AD Connect, and PowerShell. Familiarity with identity and access technologies including Conditional Access, MFA, RBAC/PIM, OIDC, OAuth 2.0, and SAML will also be valuable. You should be comfortable working collaboratively within an established team, taking ownership of operational issues, sharing knowledge, and providing support outside normal business hours or traveling when required by the role.