Assistant Manager (Information Technology)

CLA Global TS Holdings Pte Ltd; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

CLA Global TS Holdings Pte Ltd in Singapore is seeking a hands-on Assistant Manager, IT Infrastructure & Cybersecurity to support and strengthen our IT infrastructure and security operations. You will manage key IT systems, improve security controls and contribute to infrastructure projects.

The role requires 6–10 years of relevant experience in IT infrastructure, system administration or cybersecurity, with hands-on knowledge of Active Directory, Windows Server, DNS/DHCP, Microsoft 365 and

Qualifications

• Diploma or degree in Information Technology, Cybersecurity, Computer Science or related field.
• 6–10 years of relevant experience in IT infrastructure, system administration or cybersecurity.
• Hands-on knowledge of Active Directory, Group Policy, Windows Server, DNS, DHCP, and Microsoft 365.

Responsibilities

• Manage and support Active Directory, user access, Group Policy and Microsoft 365.
• Administer Windows Servers, DNS, DHCP, file services, backups and related infrastructure.
• Manage SSL/TLS certificates and Certificate Authority services, including renewals and expiry monitoring.
• Coordinate cybersecurity updates, patching, endpoint security and system hardening.
• Monitor servers and systems to ensure reliability, performance and security.
• Troubleshoot infrastructure, access, application and security-related issues.
• Maintain IT documentation, procedures and system records.
• Automate repetitive IT administration tasks using PowerShell or similar tools where possible.
• Support IT infrastructure, cybersecurity, audit and compliance projects.
• Provide guidance and escalation support to junior IT team members.

Skills

Active Directory administration

Group Policy management

Windows Server administration

Networking fundamentals

Troubleshooting

Education

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

Tools

PowerShell

Microsoft 365

Certificate Authority management

SSL/TLS certificate management

Job description

Job Description

We are looking for a hands‑on Assistant Manager, IT Infrastructure & Cybersecurity to support and strengthen our IT infrastructure and cybersecurity operations.

In this role, you will have the opportunity to manage key IT systems, improve security controls and contribute to infrastructure and cybersecurity projects.

Key Responsibilities

• Manage and support Active Directory, user access, Group Policy and Microsoft 365.

• Administer Windows Servers, DNS, DHCP, file services, backups and related infrastructure.

• Manage SSL/TLS certificates and Certificate Authority services, including renewals and expiry monitoring.

• Coordinate cybersecurity updates, patching, endpoint security and system hardening.

• Monitor servers and systems to ensure reliability, performance and security.

• Troubleshoot infrastructure, access, application and security-related issues.

• Maintain IT documentation, procedures and system records.

• Automate repetitive IT administration tasks using PowerShell or similar tools where possible.

• Support IT infrastructure, cybersecurity, audit and compliance projects.

• Provide guidance and escalation support to junior IT team members.

Job Requirements

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

• Preferably 6‑10 years of relevant experience in IT infrastructure, system administration or cybersecurity.

• Good hands‑on knowledge of:

  • Active Directory & Group Policy

  • Windows Server

  • DNS & DHCP

  • Microsoft 365

  • Server and infrastructure administration

• Experience with Certificate Authority, SSL/TLS certificates or certificate management.

• Good understanding of cybersecurity, patch management, endpoint protection and access controls.

• PowerShell or scripting knowledge will be an advantage.

• Relevant Microsoft, networking or cybersecurity certifications will be an advantage.

• Good troubleshooting and problem‑solving skills.

• Able to communicate technical matters clearly and work well with different stakeholders.

• Proactive, organised and comfortable taking ownership of IT issues and projects.

If you enjoy hands‑on IT work, solving technical challenges and improving the security and reliability of systems, we would love to hear from you.