System Support Specialist III — Go-Live & Incident Handling

One Stop Engineering; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

One Stop Engineering is seeking a senior IT systems support specialist to act as the primary escalation point for complex incidents and drive root-cause analyses with vendors. You will lead go-live, hypercare, and stabilization activities, ensuring robust monitoring and cross-functional coordination.

You will mentor junior staff, oversee change control, and ensure compliant testing and documentation across Windows, macOS, Linux, AD, Azure, Intune, and SaaS tools.

Qualifications

• Bachelor's degree in CS/IT or related field required.
• 7+ years of relevant technical support experience in enterprise environments.
• Experience with large-scale IT infrastructure and SaaS tools.

Responsibilities

• Act as primary escalation point for complex system incidents and drive RCAs with vendors and stakeholders.
• Lead system go-live, hypercare, and stabilization activities with monitoring and cross-functional coordination.
• Oversee change control processes and release readiness review support.
• Govern system configuration, access lifecycle, and periodic recertification for compliance.
• Coordinate testing programmes (UAT, OQ, PQ) and ensure regulatory-quality documentation.
• Mentor System Support Specialist I & II and support capability development.

Skills

Root cause analysis

Cross-functional coordination

Go-live coordination

Mentorship

Documentation

Education

Bachelor's degree in Computer Science / IT

Tools

Active Directory

Azure

Intune

DNS

DHCP

Microsoft Exchange

TCP/IP

VPN

Okta

Google Workspaces

Slack

Zoom

O365

Windows

macOS

Linux

Data center

Job description

One Stop Engineering is seeking a senior IT systems support specialist to act as the primary escalation point for complex incidents and drive root-cause analyses with vendors. You will lead go-live, hypercare, and stabilization activities, ensuring robust monitoring and cross-functional coordination.

You will mentor junior staff, oversee change control, and ensure compliant testing and documentation across Windows, macOS, Linux, AD, Azure, Intune, and SaaS tools.