Senior System Administrator

JDA WMS PTE. LTD.; Singapore; On-site; SGD 60,000 - 85,000; Full time

Job summary

JDA WMS Pte Ltd is seeking an IT Administrator to administer and support Microsoft 365 services, including Exchange Online, OneDrive, and Teams. You will manage Active Directory, security controls, and network infrastructure while providing end-user support across Windows devices and Office applications.

The role requires 3–5 years in IT infrastructure or cybersecurity, strong troubleshooting, and collaboration skills to coordinate with vendors and internal teams.

Qualifications

• Minimum Diploma in Computer Science, IT, or related discipline.
• Hands-on experience with Exchange Online in Microsoft 365.
• 3–5 years in system administration, IT infrastructure, or cybersecurity.
• Strong knowledge of Microsoft 365 administration and Office apps.
• Experience with Active Directory, networks, firewalls, VPNs, endpoint management, and security controls.
• Good troubleshooting and problem-solving skills.
• Strong communication skills; ability to work independently or in a team.
• Detail-oriented and well organized.

Responsibilities

• Administer, configure, maintain, and support Microsoft 365 services (Exchange Online, OneDrive, Teams).
• Manage Active Directory environments: user provisioning, access permissions, group policies, and account administration.
• Implement, monitor, and maintain 365 security and compliance controls (MFA, CA, Defender, DLP).
• Manage and support network infrastructure: firewalls, site-to-site VPNs, remote VPN connectivity.
• Provide technical and desktop support for Windows devices, Office apps, printers, peripherals.
• Monitor performance and availability of servers, endpoints, and IT systems; troubleshoot issues.
• Support Microsoft 365 deployment, migration, configuration, and tenant administration.
• Perform regular system maintenance: patching, backup, recovery, updates.
• Maintain IT documentation: configurations, procedures, records, guidelines.
• Coordinate with external vendors and internal stakeholders to resolve issues and ensure smooth IT operations.

Skills

Microsoft 365 administration

Exchange Online

Active Directory

IT security controls

Troubleshooting

VPNs

Team collaboration

Education

Diploma in Computer Science / IT

Job description

Responsibilities

• Administer, configure, maintain, and provide ongoing support for Microsoft 365 services, including Exchange Online, OneDrive, and Microsoft Teams.

• Manage Active Directory environments, including user account provisioning, access permissions, group policies, and account administration.

• Implement, monitor, and maintain Microsoft 365 security and compliance controls, including Multi-Factor Authentication (MFA), Conditional Access, Microsoft Defender, and Data Loss Prevention (DLP).

• Manage and support network infrastructure, including firewalls, site-to-site VPNs, and remote-access VPN connectivity.

• Provide technical and desktop support to end users for Windows devices, Microsoft Office applications, printers, and other peripherals.

• Monitor the performance and availability of servers, endpoints, and related IT systems, and troubleshoot technical issues when required.

• Support Microsoft 365 deployment, migration, configuration, and tenant administration activities.

• Perform regular system maintenance, including patch management, backup, recovery, and system updates.

• Maintain accurate and up-to-date IT documentation, including system configurations, procedures, technical records, and operational guidelines.

• Coordinate with external vendors and internal stakeholders to resolve technical issues and ensure smooth day-to-day IT operations.

Requirements

• Minimum Diploma in Computer Science, Information Technology, or a related discipline.

• Hands‑on experience in monitoring, administering, and maintaining Microsoft 365 email systems, particularly Exchange Online.

• Preferably 3–5 years of relevant experience in system administration, IT infrastructure, IT operations, or cybersecurity.

• Strong working knowledge of Microsoft 365 administration and Microsoft Office applications.

• Experience with Active Directory, network infrastructure, firewalls, VPNs, endpoint administration, and IT security controls is preferred.

• Good troubleshooting and problem‑solving skills with the ability to identify and resolve system and user‑related issues.

• Good verbal and written communication skills.

• Self‑motivated, results‑oriented, and able to work effectively both independently and as part of a team.

• Strong organizational skills with good attention to detail.

JDA WMS Pte Ltd | EA Personnel: Pham Thi Tuyet Mai

EA License No: 23S1595 | EA Registration No: R25127838