Senior Systems & Network Engineer - Resilience & Security

ST Engineering; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

ST Engineering Info-Security Pte. Ltd. is seeking a Senior Systems and Network Engineer to maintain and enhance reliability, security, and efficiency of enterprise IT infrastructures for clients in a fast-paced environment.

The role focuses on proactive management of IT infrastructure, incident resolution, and security enhancements, including patch management, vulnerability remediation, and change control. Collaboration with client teams and service providers is essential to ensure robust

Qualifications

• 6–8+ years in IT infrastructure management and/or information security in enterprise or customer-centric environments.
• Deep expertise in hardware, software, OS, networking and security across complex systems.
• Experience in IT operations management: system administration, patching, performance monitoring.

Responsibilities

• Lead root-cause analysis and act as escalation point for infrastructure incidents.
• Perform preventive and corrective maintenance on servers, network devices, and OS like Windows and RHEL.
• Manage incidents and problems to restore services within SLAs.
• Advise clients on performance, capacity planning and optimization of infrastructure.
• Implement and monitor security controls including patching, vulnerabilities, access control, and system hardening.
• Ensure change and release management processes to maintain system integrity.
• Document configurations, SOPs, maintenance procedures, and incident records; generate operational security reports.
• Collaborate with client teams and partners to coordinate audits, incidents, and DR exercises.
• Communicate risks and impacts to stakeholders clearly.
• Support 24x7 standby duties as required.

Skills

IT infrastructure management

Information security

Windows

RHEL

Network technologies

Incident management

Vendor management

OT familiarity

Tools

Windows Server

RHEL

Firewalls

Load balancers

Job description

ST Engineering Info-Security Pte. Ltd. is seeking a Senior Systems and Network Engineer to maintain and enhance reliability, security, and efficiency of enterprise IT infrastructures for clients in a fast-paced environment.

The role focuses on proactive management of IT infrastructure, incident resolution, and security enhancements, including patch management, vulnerability remediation, and change control. Collaboration with client teams and service providers is essential to ensure robust