Senior Infrastructure Engineer: Windows, VMware & Cloud

HENDERSON SECURITY SERVICES PTE. LTD.; Singapore; On-site; SGD 9,000 - 15,000; Full time

Job summary

HENDERSON SECURITY SERVICES PTE. LTD. is seeking an experienced IT Infrastructure Administrator to manage Windows Server environments essential to security operations.

You will handle Active Directory, DNS, DHCP, Group Policy, ADFS, Certificate Services and file services, ensuring high availability. You will monitor server performance, manage VMware, support cloud platforms (Azure, AWS, OCI) and work with vendors to maintain connectivity and security.

Qualifications

• Diploma or Degree in Information Technology, Computer Science, Computer Engineering, Information Systems or a related discipline.
• Minimum 8 years of relevant experience in IT infrastructure, systems administration or a related field.
• Strong hands-on experience in Microsoft Windows Server and Active Directory administration.
• Good knowledge of DNS, DHCP, Group Policy, ADFS and Certificate Services.
• Practical experience with VMware or other enterprise virtualization technologies.
• Experience supporting Microsoft Azure, AWS or OCI.
• Knowledge of IT infrastructure security, patch management, system monitoring and troubleshooting.
• Good understanding of IT service management and ITIL processes.
• Experience supporting infrastructure implementation, migration and upgrade projects.
• Strong analytical, troubleshooting and problem-solving skills.
• Good communication and interpersonal skills.
• Ability to work independently and collaborate with technical, operational and business teams.
• Experience supporting business-critical or security-related systems will be an advantage.
• Microsoft Azure or AWS certification is preferred.
• VMware certification is preferred.
• ITIL certification will be an advantage.

Responsibilities

• Manage and maintain Windows Server infrastructure supporting business and security operations.
• Administer Active Directory, DNS, DHCP, Group Policy, ADFS, Certificate Services and file services.
• Monitor the availability, performance and capacity of servers, systems and infrastructure.
• Manage VMware virtual infrastructure, including server provisioning, configuration, monitoring and troubleshooting.
• Support Microsoft Azure, AWS and other cloud infrastructure platforms.
• Provide technical support for IT systems and infrastructure supporting security operations and business functions.
• Troubleshoot server, system, network and infrastructure-related issues and conduct root cause analysis.
• Manage server patching, security updates, antivirus and other infrastructure security requirements.
• Support IT infrastructure for security-related systems, operational applications and business-critical services.
• Participate in infrastructure implementation, migration, upgrade and system enhancement projects.
• Work with internal teams, vendors and service providers to maintain reliable connectivity and availability of IT systems.
• Manage IT incidents, problems and changes in accordance with established IT service management procedures.
• Prepare and maintain technical documentation, implementation plans, system procedures and operational reports.
• Maintain accurate infrastructure and configuration records.
• Support IT security, compliance, audit and business continuity requirements.
• Provide technical assistance and guidance to IT support staff and users.
• Participate in scheduled maintenance, system upgrades and on-call support when required.

Skills

Windows Server

Active Directory

DNS

DHCP

Group Policy

ADFS

Certificate Services

VMware

Azure

AWS

OCI

ITIL

Troubleshooting

IT Service Management

Education

Diploma or Degree in Information Technology

Tools

VMware

Azure

AWS

OCI

Job description

HENDERSON SECURITY SERVICES PTE. LTD. is seeking an experienced IT Infrastructure Administrator to manage Windows Server environments essential to security operations.

You will handle Active Directory, DNS, DHCP, Group Policy, ADFS, Certificate Services and file services, ensuring high availability. You will monitor server performance, manage VMware, support cloud platforms (Azure, AWS, OCI) and work with vendors to maintain connectivity and security.