System Manager (JD#11288)

SCIENTE INTERNATIONAL PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

SCIENTE INTERNATIONAL PTE. LTD.

is seeking an experienced System Manager to oversee a 24x7 mission-critical infrastructure, leading a team of system engineers and ensuring high availability, cybersecurity, incident recovery, and operational continuity. You will collaborate with the Service Delivery Manager to plan maintenance, deploy patches, and drive service improvements, while remaining available for after-hours deployments and on-call duties.

Qualifications

• Degree/Diploma in Computer Science, IT, Computer Engineering, or related field.
• 6 years of experience in enterprise infrastructure or mission-critical environments, with 3 years leading a team.
• 3 years experience managing O&M activities for critical systems.
• Experience with Windows Server 2019+/Windows 11, Active Directory, GPO, PKI, and SSL/TLS certificate management.

Responsibilities

• Lead day-to-day operations of a 24x7 mission-critical system with a team of system engineers.
• Manage system availability, performance, security, and operational readiness.
• Work with the SDM to plan maintenance, patching, upgrades, and service improvements.
• Lead incident response, root cause analysis, service recovery, and operational reporting.

Skills

Team leadership

Windows Server

Active Directory

VMware ESXi

Patch management

SQL Server

Cybersecurity

O&M management

Incident response

Education

Degree/Diploma in Computer Science/IT/CE

Tools

VMware ESXi/vCenter/vSAN

WSUS

Trellix/SEP

SSL/TLS management

Splunk Enterprise

Syslog

Job description

Job Summary

We are looking for an experienced System Manager to manage 24x7 mission-critical infrastructure, leading system/application engineers and ensuring availability, cybersecurity, incident recovery, and operational continuity.

Mandatory Skill-set

• Degree/Diploma in Computer Science, IT, Computer Engineering, or related field;
• Must have 6 years of experience in enterprise infrastructure, systems administration, or mission-critical environments, include 3 years of leading a team;
• Must have 3 years of experience managing Operations & Maintenance (O&M) activities for critical systems;
• Strong hands-on experience with Windows Server 2019+/Windows 11, Active Directory, GPO, Microsoft CA, PKI, and SSL/TLS certificate management;
• Must have VMware experience, including ESXi, vCenter, vSAN, and vSAN Stretch Cluster;
• Hands-on experience in patch management, including WSUS Offline and manual WSUS catalogue imports;
• Hands-on experience with Microsoft SQL Server, endpoint security (Trellix/SEP), cybersecurity technologies, and enterprise backup/restore solutions;
• Experience troubleshooting 24x7 mission-critical, highly available, on-premise environments, including critical incidents and service recovery, is essential;
• Willingness to support after-hours deployments, maintenance windows, and on-call duties.

Desired Skill-set

• Good to have experience in Splunk Enterprise / Syslog / Kiwi Syslog VMware NSX.
• Aviation systems experience in airport operations, air traffic management, surveillance, or aviation support systems.

Responsibilities

• Lead day-to-day operations of a 24x7 mission-critical system with a team of system engineers;
• Manage system availability, performance, security, and operational readiness;
• Work closely with the Service Delivery Manager (SDM) to plan and execute maintenance, patching, upgrades, and service improvement initiatives;
• Lead incident response, root cause analysis, service recovery, and operational reporting activities with the SDM;
• Review and approve deployment plans, impact assessments, risk evaluations, and rollback strategies;
• Manage infrastructure lifecycle activities, including server, workstation, virtualization, network, and COTS software upgrades;
• Ensure compliance with cybersecurity, backup, disaster recovery, and configuration management requirements;
• Identify operational risks, technology gaps, and potential single points of failure, and implement effective mitigation measures;
• Provide technical leadership, mentoring, and guidance to the operations team;
• Engage stakeholders, customers, and vendors on operational matters and service delivery performance.