System Manager

Sciente Pte.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Sciente Pte. in Singapore is seeking an experienced System Manager to lead a 24x7 mission-critical infrastructure, driving availability, security, incident recovery, and continuous improvements.

You will manage a team of system engineers, coordinate with the Service Delivery Manager to plan maintenance, patching, upgrades, and service improvement initiatives, and ensure robust incident handling and service performance.

Qualifications

• Bachelor-level degree or diploma in CS/IT/Engineering or related field.
• Minimum 6 years in enterprise infrastructure with 3 years in a leadership role.
• 3 years O&M experience for critical systems; after-hours support willingness.

Responsibilities

• Lead day-to-day operations of a 24x7 mission-critical system with a team of engineers.
• Ensure system availability, performance, security, and operational readiness.
• Coordinate with SDM to plan maintenance, patching, upgrades and service improvements.
• Lead incident response, root cause analysis, and service recovery.
• Review deployment plans, risk assessments, and rollback strategies.
• Manage lifecycle of infrastructure including servers, virtualization, network, and COTS upgrades.
• Ensure cybersecurity, backup, DR, and CM requirements are met.
• Identify risks and mitigations; mentor the operations team.
• Engage with stakeholders and vendors on service delivery.

Skills

Leadership experience

5+ years enterprise infra

Windows server administration

Active Directory/ GPO

VMware ESXi/vCenter/vSAN

SLA/incident management

Patch management

Cybersecurity concepts

SQL Server administration

On-call support

Education

Degree/Diploma in CS/IT/Engineering

Tools

VMware ESXi

vCenter

vSAN

WSUS

Windows Server 2019+/Windows 11

Active Directory

PKI/SSL TLS management

Trellix/SEP

Microsoft SQL Server

Splunk/ Syslog (desirable)

Job description

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.

Confidentiality is assured, and only shortlisted candidates will be notified for interviews.