INFRASTRUCTURE & SECURITY ENGINEER

TRUSTED HUB LTD; Singapore; On-site; SGD 50,000 - 70,000; Full time

Job summary

A leading technology firm is looking for an experienced IT Infrastructure Specialist in Singapore. This role involves installing and maintaining servers and network devices, optimizing data center infrastructure, and automating tasks with PowerShell. The ideal candidate has at least 3 years of experience, strong knowledge in Microsoft Windows Server, and is proficient in virtualization tools like Hyper-V and VMware. A strong problem-solving mindset and ability to work collaboratively are essential.

Qualifications

• Minimum 3 years of hands-on experience in IT infrastructure roles.
• Solid understanding of VLANs, Layer 2/3 switching, routing, and firewall configurations.
• Familiarity with infrastructure security hardening and applying CIS Benchmarks.

Responsibilities

• Install, configure, and maintain servers and network devices.
• Manage and optimize data center infrastructure.
• Support network infrastructure, ensuring performance and stability.
• Automate administrative tasks using PowerShell.
• Provide Level 1 and Level 2 technical support.

Skills

Microsoft Windows Server

Active Directory

PowerShell scripting

Network architecture

Virtualization platforms

Problem-solving

Education

Diploma or higher in Information Technology

Tools

Hyper-V

VMware

Job description

Responsibilities:

• Install, configure, and maintain physical and virtual servers (latest Windows Server OS), network devices (switches, firewalls), and desktops/laptops in a secure, on-premise data center environment.
• Manage and optimize the data center infrastructure, including physical rack organization, cabling, environmental controls, and power management.
• Support and improve network infrastructure — including design, VLAN configuration, routing, switching, and firewall rules — to ensure performance, stability, and scalability.
• Perform system and network hardening following industry standards (e.g., CIS Benchmarks) and security best practices.
• Monitor system and network performance; troubleshoot and resolve infrastructure issues across servers, networks, storage, and endpoints.
• Automate routine administrative tasks using PowerShell and scripting to improve operational efficiency and consistency.
• Support and maintain infrastructure applications such as backup systems, antivirus, endpoint protection, monitoring tools, and logging platforms.
• Manage and secure file transfer services (e.g., SFTP), ensuring encryption, access control, and policy enforcement.
• Participate in or support the execution of patch management, upgrades, and server migrations (including off-hours or weekends when needed).
• Deploy and maintain virtualization platforms including Hyper-V and VMware, including provisioning, resource allocation, and snapshots.
• Assist in planning and executing infrastructure projects — including server refreshes, office IT deployments, and client site setups.
• Provide Level 1 and Level 2 technical support for internal users and clients, and ensure all incidents and tasks are properly documented.
• Collaborate with security stakeholders or vendors on vulnerability assessments and penetration testing (VAPT); assist in remediation and documentation.
• Support compliance with data protection regulations (e.g., PDPA) and implement relevant technical and administrative controls.
• Maintain documentation for infrastructure configurations, procedures, security policies, and incident reports.

Requirements:

• Diploma or higher in Information Technology, Computer Engineering, or a related field.
• Minimum 3 years of hands-on experience in IT infrastructure, data center, or systems/network administration roles.
• Strong knowledge of Microsoft Windows Server (2016/2019/2022), Active Directory, DNS, DHCP, and Group Policy.
• Experience managing virtualization platforms including Hyper-V and VMware in a production environment.
• Proficiency in PowerShell scripting for task automation and system management.
• Solid understanding of network architecture, VLANs, Layer 2/3 switching, routing, and firewall configurations.
• Familiarity with infrastructure security hardening, patching, and applying CIS Benchmarks or other recognized security guidelines.
• Experience implementing or supporting Vulnerability Assessment and Penetration Testing (VAPT) activities.
• Familiarity with secure protocols such as SFTP, SSL/TLS, and concepts like least privilege and access control.
• Able to work outside regular business hours (e.g., weekends or evenings) during critical maintenance windows or infrastructure rollouts.
• Strong problem-solving skills and a professional, collaborative attitude.
• Willing to travel occasionally for customer site support and deployment.

Added Advantages:

• Able to work independently and as a team, being proactive with a mind for details and creative in trouble-shooting and problem-solving.
• Demonstrate problem-solving skills or work improvements, especially with different approaches as well as leveraging usage of tools and/or AI.
• Ability to source for solutions (software/hardware/hybrid) that are economical, timely and good.