Senior Windows Infrastructure Engineer

Unitech Consulting; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Unitech Consulting is seeking an experienced Senior Windows Infrastructure Engineer to manage and support an enterprise Windows server environment in a financial services setting. You will handle server deployment, performance tuning, patching, and DR/BCP, with on-call support and rotating shifts aligned to European business hours.

The role requires hands-on expertise across Windows Server 2012–2022, Hyper-V, vSphere, AD, and enterprise hardware.

Qualifications

• 8–10 years in Windows Server administration and enterprise infra.
• 3–5 years in banking/financial services environments.
• Expert-level Hyper-V and Failover Clustering know-how.
• VMware vSphere/ESXi/vCenter hands-on experience.
• Scripting in PowerShell and Python; Perl/VBScript a plus.
• Security patching, vulnerability remediation and DR/BCP.
• ITIL processes familiarity and incident management.
• Capable of rotating shifts incl. European hours.

Responsibilities

• Manage enterprise Windows Server environments (2012–2022).
• Provide Hyper-V and clustering SME support.
• Administer VMware virtualization stack and related platforms.
• Handle Active Directory, access controls and authentication.
• Maintain server hardware (HPE ProLiant, HPE Synergy, HPE SimpliVity).
• Deploy, configure, upgrade, and migrate infrastructure.
• Apply patches, updates, and remediation tasks.
• Run vulnerability assessments and coordinate fixes.
• Monitor performance and health using monitoring tools.
• Develop automation scripts and assist DR/BCP testing.
• Participate in projects and coordinate incidents with teams.

Skills

Windows Server administration

Hyper-V

Failover Clustering

Active Directory

Scripting (PowerShell, Python)

Vulnerability remediation

Disaster recovery planning

Incident troubleshooting

On-call experience

Automation

Tools

VMware vSphere/ESXi/vCenter

HP OMI

Tivoli

Altiris

BMC

Tenable/Nessus

Job description

Job Summary:

We are seeking an experienced senior Windows infrastructure engineer to manage, maintain, and support enterprise Windows server infrastructure in a financial services environment. The role requires strong hands-on expertise in Windows Server administration, Hyper-V virtualization, Microsoft Failover Clustering, Active Directory, and enterprise server hardware.

The successful candidate will be responsible for infrastructure operations, server deployment, performance optimization, security patching, vulnerability remediation, disaster recovery, and production support. The candidate must be comfortable working in rotating shifts primarily covering European business hours, with rotational on-call support during weekdays and weekends.

Key Responsibilities:

• Manage, administer, and troubleshoot enterprise Windows Server environments, including Windows Server 2012, 2016, 2019, and 2022.
• Provide subject matter expertise in Microsoft Hyper-V virtualization and failover clustering technologies.
• Manage and maintain VMware vSphere, ESXi, vCenter, and related virtualization platforms.
• Administer Microsoft Active Directory, including user and group management, access controls, security permissions, and authentication.
• Manage and support enterprise server hardware, including HPE ProLiant DL servers, HPE Synergy, HPE SimpliVity, and related data center infrastructure.
• Perform server deployment, configuration, maintenance, upgrades, and infrastructure migrations.
• Implement security patches, OS updates, and vulnerability remediation activities.
• Conduct vulnerability assessments and coordinate remediation using tools such as Tenable/Nessus.
• Monitor infrastructure performance, availability, and health using tools such as HP OMI, Tivoli, and other monitoring platforms.
• Troubleshoot complex infrastructure issues involving Windows OS, virtualization, network, storage, and application dependencies.
• Develop and maintain automation scripts using PowerShell, Python, Perl, and VBScript.
• Support infrastructure backup, business continuity, and disaster recovery activities, including failover testing and service recovery.
• Participate in infrastructure projects, solution deployment, upgrades, and technology transformation initiatives.
• Work with internal teams, vendors, and stakeholders to resolve critical incidents and ensure service availability.
• Follow ITIL-based incident, problem, change, and operational management processes.
• Provide rotational on-call support during weekdays and weekends and work in rotating shifts primarily covering European business hours.

Job Requirements:

• Minimum 8-10 years of relevant experience in Windows Server administration and enterprise infrastructure management.
• Minimum 3-5 years of experience supporting IT infrastructure within banking or financial services institutions.
• Strong hands-on expertise in Windows Server operating systems (2012/2016/2019/2022).
• Expert-level knowledge of Microsoft Hyper-V and Failover Clustering.
• Strong knowledge of VMware vSphere, ESXi, and vCenter technologies.
• Hands-on experience with enterprise server hardware, preferably HPE ProLiant DL servers, HPE Synergy, and HPE SimpliVity.
• Strong knowledge of Active Directory administration, user access management, and security permissions.
• Experience in infrastructure security patching, vulnerability assessment, and remediation.
• Hands-on scripting experience with PowerShell and Python; Perl and VBScript knowledge will be an advantage.
• Experience with infrastructure monitoring, patch management, and deployment tools such as HP OMI, Tivoli, Altiris, and BMC.
• Good understanding of infrastructure performance troubleshooting across network, storage, and application environments.
• Experience in business continuity planning (BCP), disaster recovery planning (DRP), and infrastructure failover operations.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent communication and interpersonal skills, with a customer-service-oriented approach.
• Ability to work independently and collaboratively under pressure.

Work Environment:

• Working hours: Rotational shifts, primarily covering European business hours.
• On-call support: Required on a rotational basis, including weekdays and weekends.