Assistant Manager, IT Infrastructure & Cybersecurity

CLA GLOBAL TS HOLDINGS PTE. LTD.; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

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

You will also guide junior team members, coordinate cybersecurity updates, and drive ongoing improvements in security and reliability across our technology environment.

Qualifications

• Diploma or degree in IT, cybersecurity, CS, or related field.
• 6–10 years experience in IT infrastructure, system administration or cybersecurity.
• Hands-on knowledge of AD, Group Policy, Windows Server, DNS/DHCP, Microsoft 365.
• Certifications in Microsoft, networking or cybersecurity are a plus.
• Strong troubleshooting, communication, and ownership.

Responsibilities

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

Skills

Active Directory

Group Policy

Microsoft 365

Windows Server

Certificate management

Cybersecurity basics

PowerShell scripting

Troubleshooting

Communication

Education

Diploma or Degree in IT, Cybersecurity, Computer Science or related field

Tools

PowerShell

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.