Senior Enterprise Systems Manager - Windows, VMware & Security

sciente international pte. ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

null

Job summary

sciente international pte. ltd. is seeking an experienced system manager to lead the administration, maintenance, and enhancement of enterprise IT infrastructure in Singapore. You will manage a team of system engineers, ensure high availability, and drive upgrades across Windows, VMware, networking, and security.

You will provide technical leadership, oversee patch management, backups, and security controls, and collaborate with stakeholders to uphold operational excellence and compliance.

Qualifications

• 6+ years in systems infrastructure with 3+ years leading a team of 3+ engineers.
• Strong Windows Server and AD administration experience.
• VMware ESXi/vCenter, vSAN, NSX experience and upgrades.
• Patch management, certificates, antivirus, backup & recovery expertise.
• Networking, security concepts, and centralized logging familiarity.
• Experience with enterprise infrastructure projects and change management.

Responsibilities

• Lead and mentor a team of system engineers with technical oversight.
• Maintain high system availability and perform preventive health checks.
• Plan upgrades for servers, VMware, networks, and COTS platforms.
• Assess changes with testing, rollback planning, and impact analysis.
• Troubleshoot complex infrastructure, server, virtualization, and network issues.
• Administer Windows Servers, Active Directory, SQL Server, VMware, and security infra.
• Oversee patching, SSL lifecycle, antivirus management, backups, and logging.
• Ensure security, compliance, performance, and adherence to best practices.

Skills

Team leadership

Systems infrastructure

Windows server administration

VMware ESXi/vCenter

Networking & security concepts

Troubleshooting

Patching & certificate management

Backup & recovery

Incident & change management

Mentoring engineers

Education

Degree/Diploma in Computer Science/IT/Engineering

Tools

VMware ESXi

vCenter

vSAN

NSX

Windows Server

WSUS

Microsoft SQL Server 2019+

Active Directory

Symantec SEP/SEPM

Trellix ePO

Splunk

Syslog

Job description

sciente international pte. ltd. is seeking an experienced system manager to lead the administration, maintenance, and enhancement of enterprise IT infrastructure in Singapore. You will manage a team of system engineers, ensure high availability, and drive upgrades across Windows, VMware, networking, and security.

You will provide technical leadership, oversee patch management, backups, and security controls, and collaborate with stakeholders to uphold operational excellence and compliance.