Senior Systems Engineer: Azure & Security

Rajah & Tann Singapore LLP; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Rajah & Tann Singapore LLP is seeking an experienced Systems Engineer to design, implement, and maintain secure, scalable IT infrastructure across on-premises and cloud environments, spanning Windows, Linux, Azure, and Microsoft 365.

You will work with IT and business teams on cloud migrations, security hardening, automation with PowerShell and Bash, and disaster recovery planning to ensure resilience and audit readiness.

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, Engineering or related discipline.
• 5+ years in infrastructure engineering or related roles.
• 3+ years Windows Server administration (AD, DNS, GPO).
• 3+ years Linux administration (RHEL/Ubuntu).
• 3+ years Microsoft 365 administration (Exchange Online, SharePoint Online, Teams, Entra ID).
• Hands-on Azure services experience (VMs, VNets, NSGs, Load Balancers, Storage, Backup, Site Recovery).
• Networking fundamentals and enterprise network infrastructure experience.
• Experience with infrastructure security, patch management, CIS benchmarks, IAM.

Responsibilities

• Design, implement and maintain enterprise infrastructure across Windows and Linux.
• Deploy and manage Azure-based infrastructure including VMs, networking, and identity services.
• Administer Windows and Linux servers, patching, hardening, and lifecycle management.
• Configure and manage network infrastructure including firewalls, VPNs, and load balancers.
• Implement security controls and ensure audit readiness.
• Monitor health and performance, analyze incidents and perform RCA with permanent remediation.
• Develop automation scripts (PowerShell, Bash) to streamline provisioning and operations.
• Design and maintain backup and disaster recovery solutions.
• Collaborate with internal teams and vendors on infrastructure projects and migrations.

Skills

Infrastructure engineering

Automation scripting

Security best practices

Stakeholder communication

Team collaboration

Education

Bachelor’s degree in Computer Science, Information Systems, Engineering or related discipline

Tools

PowerShell

Bash

Azure Monitor

Azure Arc

Veeam

Palo Alto

Meraki

Active Directory

DNS

Group Policy

Job description

Rajah & Tann Singapore LLP is seeking an experienced Systems Engineer to design, implement, and maintain secure, scalable IT infrastructure across on-premises and cloud environments, spanning Windows, Linux, Azure, and Microsoft 365.

You will work with IT and business teams on cloud migrations, security hardening, automation with PowerShell and Bash, and disaster recovery planning to ensure resilience and audit readiness.