24/7 On-Prem System Engineer for Mission-Critical Systems

SCIENTE; Singapore; On-site; SGD 60,000 - 100,000; Full time

Job summary

SCIENTE in Singapore seeks a hands-on System Engineer to lead and support 24x7 mission-critical systems in secure on-premises environments. You will administer Windows Server, AD, and VMware, monitor with Splunk, and manage patches, DR, and security.

Responsibilities include on-site incident handling, after-hours support, and collaboration with OEM vendors for root cause analysis. This role requires strong troubleshooting and operational leadership.

Qualifications

• Minimum 2 years in Systems Administration or mission-critical environments.
• Hands-on with Windows Server, Active Directory, GPO, and SQL Server.
• Experience with VMware, L2/L3 networking, and Splunk monitoring.
• Knowledge of backup/recovery, DR, patching, and cybersecurity solutions.
• Strong troubleshooting and analytical skills.
• Willing to provide on-site support for incidents including after-hours.

Responsibilities

• Administer and maintain Windows servers, workstations, and AD environments.
• Manage patches, security updates, OS/software/firmware upgrades.
• Perform SSL certificate renewal and management across components.
• Maintain VMware virtualization infrastructure (ESXi, vCenter, vSAN, NSX).
• Monitor logs with Splunk and Syslog tools.
• Troubleshoot issues and coordinate with OEM vendors for RCAs.
• Monthly preventive maintenance, health checks, and reporting.
• Support deployments and changes during off-peak hours.
• Manage L1-L3 incident tickets and service requests.
• Provide 24/7 L2 on-call support per rotation.

Skills

Windows Server

Active Directory

GPO

SQL Server

VMware

Networking (L2/L3)

Splunk

Backup & DR

Cybersecurity

Troubleshooting

On-site support

Tools

ESXi

vCenter

vSAN

NSX

Splunk

Syslog

Job description

SCIENTE in Singapore seeks a hands-on System Engineer to lead and support 24x7 mission-critical systems in secure on-premises environments. You will administer Windows Server, AD, and VMware, monitor with Splunk, and manage patches, DR, and security.

Responsibilities include on-site incident handling, after-hours support, and collaboration with OEM vendors for root cause analysis. This role requires strong troubleshooting and operational leadership.