IT Infrastructure Manager (Hands-on)

LUMINA ADVISORY & GLOBAL SEARCH PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

LUMINA ADVISORY & GLOBAL SEARCH PTE. LTD. in Singapore seeks a hands-on IT Infrastructure Manager to lead technical operations and drive IT transformation across Windows, Linux and Mac environments.

The role combines daily troubleshooting with infrastructure upgrades, cloud migrations, and regional standardisation. You will manage a lean IT team, engage vendors, and ensure security, reliability and cost efficiency across the organisation.

Qualifications

• Education: Bachelor’s degree or above in Information Management, Computer Science, or related field.
• Experience: Minimum 8 years of IT/MIS experience, incl. 3 years in a managerial role; proven experience in multinational IT systems integration and project management; hands-on Linux servers and cross‑platform environments.
• IT Transformation: Proven track record leading end‑to‑end IT transformation projects (infrastructure modernisation, cloud migration, automation) with measurable improvements.
• Technical Skills: Proficiency in Linux admin and troubleshooting, open-source ecosystems, networking, virtualization, automation, APIs, identity services, security, auditing, DLP, and end‑point protection.

Responsibilities

• Lead IT transformation, modernisation, and cloud migration initiatives across regions.
• Oversee and support Linux servers and mixed OS environments (Linux, Windows, macOS).
• Manage network infrastructure (LAN/WAN/VPN/cloud) and ensure secure connectivity.
• Plan end‑to‑end system integrations across servers, storage, IAM, email, apps, APIs and cloud platforms.
• Establish IT governance, security standards (ISO 27001, GDPR) and risk assessments.

Skills

Linux administration

Windows

macOS

Networking

Scripting

Automation

Cloud technologies

Information security

Identity services

Endpoint security

Project management

Vendor management

Change management

Cross-cultural collaboration

Education

Bachelor’s degree in Information Management, Computer Science, or related field

Tools

Active Directory/LDAP

MDM

Virtualization

Cloud platforms

Job description

Our client, a Singapore-based SME with overseas operations, is seeking a hands‑on IT Infrastructure Manager to manage and improve its IT environment. The role combines daily technical troubleshooting with infrastructure upgrades, systems integration and IT transformation. The successful candidate must be comfortable in managing a lean IT team while remaining hands‑on in technical implementation and troubleshooting.

Key Responsibilities

IT Transformation & Modernisation: Assess the existing IT environment and develop a practical transformation roadmap aligned with business priorities. Lead and personally execute infrastructure modernisation, legacy system upgrades, cloud migrations, automation and regional standardisation. Manage project scope, timelines, budgets, vendors and risks; oversee testing, cutover, rollback planning, documentation and user adoption, and measure improvements in reliability, security, efficiency and cost.

Computer Systems Management:Oversee and maintain computer systems across all branch offices, including both Windows and macOS environments; standardize procurement, installation, maintenance, and replacement processes to ensure efficiency and stability.

Linux & Open-Source Platforms: Take direct ownership of Linux servers and open‑source platforms; install, configure, secure, patch, monitor, automate, and troubleshoot production systems. Evaluate, deploy, and support suitable open‑source solutions while maintaining clear documentation and operational standards.

Network Infrastructure Management:Manage and monitor network infrastructure (LAN/WAN/VPN/cloud services) for branch offices worldwide; ensure secure and stable connectivity across multiple regions.

Systems Integration & Optimization:Plan, design, and execute end‑to‑end integration across servers, storage, file systems, identity and access management, email, business applications, APIs, databases, and cloud platforms; troubleshoot interoperability issues and deliver reliable hybrid solutions across Linux, Windows, and MacOS environments (e.g., Active Directory/LDAP, SSO, MDM, file sharing, and automation).

Cloud Integration:Manage and integrate Microsoft 365, Apple iCloud, and Google Workspace in hybrid cloud environments; ensure account, email, collaboration tools, and file security across platforms.

Global IT Integration:Lead IT system integration projects for multinational subsidiaries; develop IT governance policies that comply with local regulations and global corporate standards.

Information Security & Endpoint Protection:Implement endpoint security policies (user access control, patch management, antivirus, endpoint protection); establish Data Loss Prevention (DLP) measures to monitor and prevent information leakage.

Risk Control & Compliance:Define IT security standards and audit mechanisms to comply with international frameworks (e.g., ISO 27001, GDPR); conduct periodic vulnerability assessments, penetration testing, and staff training.

Travel Requirements: Occasional travel to branch offices and overseas sites required.

Qualifications

Education:Bachelor’s degree or above in Information Management, Computer Science, or related field.

Experience: Minimum 8 years of IT/MIS experience, including at least 3 years in a managerial role; proven experience in multinational IT systems integration and project management; substantial hands‑on experience administering Linux servers and mixed Linux, Windows, and Apple environments (Active Directory/LDAP, MDM, cross‑platform security, scripting, and automation).

IT Transformation Experience (Required): Proven track record of leading and personally implementing end‑to‑end IT transformation projects, such as infrastructure modernisation, cloud migration, legacy system replacement or workflow automation. Able to translate business needs into technical roadmaps and deliver projects from assessment and solution design through implementation, migration and post‑deployment support. Must demonstrate direct technical contributions and measurable business or operational improvements, with experience in stakeholder coordination, change management and maintaining business continuity during transitions.

Technical Skills: Must be highly proficient in Linux administration and troubleshooting, including command‑line tools, shell scripting, package management, permissions, networking, system services, performance tuning, patching, and hardening. Strong knowledge of open‑source technologies and ecosystems, network architecture (LAN/WAN/VPN),server and cloud infrastructure, virtualization/containers, monitoring, backup, and automation; expertise in systems integration, APIs, identity services, information security, auditing, DLP, firewalls, and endpoint security.

Certifications (Preferred): Linux certifications such as RHCSA/RHCE or LFCS/LFCE; Microsoft Certified (Azure Administrator / Solutions Architect / Microsoft 365 EnterpriseAdministrator Expert); Apple Certified Support Professional (ACSP) or similar MacOS integration certification; CISSP / CCNP / PMP are a plus.

Language: Proficiency in spoken and written English to collaborate with international teams. Proficiency in spoken and written Chinese, including reading comprehension, is required to liaise with Chinese‑speaking stakeholders and handleChinese-language communications and documentation.

Personal Attributes: A highly hands‑on, resourceful self‑starter who can independently diagnose problems, make sound technical decisions, and deliver solutions with minimal supervision. Strong ownership, leadership, strategic thinking, communication, documentation, and stakeholder‑management skills, with the ability to work effectively under pressure.