System Infrastructure Manager

We are seeking an experienced Infrastructure Systems Specialist to manage and maintain a broad range of systems and infrastructure.

This role involves managing, monitoring, and maintaining servers, virtualization platforms, storage devices, firewalls, and related infrastructure. The successful candidate will also be responsible for installing, configuring, testing, and maintaining operating systems (Windows Server, RHEL), middleware, application software, and system management tools.

• Key Responsibilities:
  • Manage, monitor, and maintain servers, virtualization platforms, storage devices, firewalls, and related infrastructure.
  • Install, configure, test, and maintain operating systems (Windows Server, RHEL), middleware, application software, and system management tools.
  • Perform system upgrades, patch management, capacity planning, and performance tuning.
• Day 2 Operations & Support:
  • Provide enterprise-wide operational support for Microsoft Windows, Linux, VMware, and middleware platforms.
  • Respond to and resolve infrastructure and system incidents, escalating where necessary.
  • Participate in 24/7 on-call support rotations and provide timely incident response.
  • Conduct daily health checks, log reviews, and preventive maintenance activities.
• Security & Compliance:
  • Perform security hardening and testing based on CIS benchmarks and Singapore Government security standards.
  • Manage user accounts, access controls, password resets, and system roles securely.
  • Ensure compliance with IT governance, audit, and regulatory requirements.
  • Support disaster recovery planning, testing, and execution.
• Collaboration & Projects:
  • Participate in the design and implementation of new infrastructure solutions and enhancements.
  • Liaise with vendors, service providers, and internal IT teams to resolve issues and deliver solutions.
  • Support IT audits, capacity planning, and documentation of infrastructure standards and procedures.
• Patch Management & Upgrades:
  • Test, stage, and deploy OS patches, firmware updates, and COTS/middleware upgrades.
  • Apply change management best practices for controlled deployment of fixes and enhancements.
• Hardware & Platform Support:
  • Support and maintain enterprise-grade hardware: Dell servers, Cisco switches, FortiGate firewalls, UPS, storage (Dell EMC), and power management.
  • Manage and troubleshoot enterprise platforms such as:
    • Middleware & Integration: IBM MQ, IBM ACE, Kafka, WebSphere
    • Databases & Data Services: MS SQL, MongoDB
    • GIS & Applications: ArcGIS, Elastic Stack, Rocket.Chat
    • Security Tools: Symantec, Carbon Black EDR, CipherTrust, Keycloak, Fortify WebInspect
    • DevOps & Monitoring: Grafana, Prometheus, GitLab Enterprise, Ansible, OpenShift, Red Hat Satellite
• Documentation & Continuous Improvement:
  • Maintain SOPs, system diagrams, maintenance logs, and incident reports.
  • Generate reports on incidents, performance, and preventive actions.
  • Propose automation and reliability improvements to strengthen system resilience.

Requirements:

Eligibility:

• Must be a Singapore Citizen.

Education & Certification:

• Diploma / Bachelor's Degree in Computer Science, Information Technology, or equivalent.
• Relevant certifications (preferred but not mandatory): MCSE / Microsoft Certified Solutions Expert, RHCSA / RHCE (Red Hat), VMware VCP, ITIL Foundation

Experience & Skills:

• At least 3–5 years of combined experience in system administration and infrastructure support.
• Strong knowledge of Windows Server, RHEL, VMware, and enterprise hardware (servers, storage, networking).
• Hands-on experience with backup and recovery solutions, firewalls, and middleware platforms.
• Familiarity with container platforms (OpenShift/Kubernetes), DevOps tools (Ansible, GitLab), and IT monitoring stacks (Grafana, Prometheus).
• Working knowledge of ITIL processes (incident, change, and problem management).

Soft Skills:

• Strong analytical and troubleshooting skills.
• Positive attitude, initiative, and passion for operational support.
• Good communication and collaboration skills.
• Able to work independently and under pressure.
• Willingness to work on-call, perform shift duties, and respond promptly in critical situations.