Senior Systems & Network Engineer — 24x7 Ops Lead

ST Engineering; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

ST Engineering Info-Security invites a Senior Systems and Network Engineer to join our Jurong East team. You will maintain and enhance enterprise IT infrastructures, ensure reliability, security, and efficiency for client environments, and lead technical incident resolutions.

The role emphasizes proactive maintenance, strong Windows and RHEL expertise, and collaboration with client teams to uphold service levels and security standards.

Qualifications

• <6–8 years of IT infrastructure management and/or information security experience in enterprise or customer-centric environments.
• Deep expertise in IT infrastructure components, including hardware, software, operating systems, networking and security principles.
• Proven track record in IT operations management, including system administration, patch management and performance monitoring.
• Strong proficiency in Windows and RHEL operating systems, with experience in firewalls, switches and load balancers.
• Excellent communication and stakeholder management skills, able to articulate technical concepts to non‑technical audiences.
• Experience with vendor management and a proactive approach to learning new technologies and methodologies.
• OT (Operational Technology) experience is an advantage.
• Ability to support round‑the‑clock standby duties.

Responsibilities

• Lead root-cause analysis for complex incidents and act as escalation point for infrastructure issues.
• Maintain and optimize servers and network devices (firewalls, load balancers, switches) across Windows and RHEL environments.
• Perform incident and problem management to restore services within SLAs.
• Advise clients on performance, capacity planning and optimization strategies.
• Implement security controls including patch management and vulnerability remediation.
• Apply changes and releases following governance to maintain system integrity and security posture.
• Document configurations, SOPs, recovery procedures, and produce incident post-mortems and RCA reports.
• Coordinate with client teams, internal departments and external providers for audits, changes and DR exercises.
• Communicate risks and service impacts clearly to stakeholders, including non-technical audiences.
• Demonstrate autonomous task ownership and participate in 24x7 standby as required.

Job description

ST Engineering Info-Security invites a Senior Systems and Network Engineer to join our Jurong East team. You will maintain and enhance enterprise IT infrastructures, ensure reliability, security, and efficiency for client environments, and lead technical incident resolutions.

The role emphasizes proactive maintenance, strong Windows and RHEL expertise, and collaboration with client teams to uphold service levels and security standards.