Senior Systems and Network Engineer

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

Job summary

ST Engineering Info-Security Pte. Ltd. invites a seasoned Senior Systems and Network Engineer to maintain and enhance enterprise IT infrastructure for clients in a dynamic, security-focused environment.

The role emphasizes reliability, security, incident resolution, and continuous improvement across Windows, RHEL, and network devices. You will lead root-cause analyses, manage incidents, and coordinate with client teams and service providers to ensure continuous business operations.

Qualifications

• Minimum 6–8 years in IT infrastructure management or information security.
• Strong knowledge of Windows and RHEL operating systems.
• Experience with patch management, incident and problem management.
• OT exposure is an advantage with adaptability to varied environments.

Responsibilities

• Lead root-cause analysis for complex incidents and serve as escalation point.
• Maintain and secure IT infrastructure; manage servers and network devices.
• Perform preventive/corrective maintenance for reliability and uptime.
• Advise on performance, capacity planning, and optimization strategies.
• Implement and enforce security controls, patching, access management, hardening.
• Follow Change/Release Management for patches and updates.
• Document configurations, SOPs, recovery procedures, and incident records.
• Coordinate with client teams, internal units, and service providers.
• Communicate risks and solutions clearly to stakeholders.
• Demonstrate autonomy, prioritisation, and ownership of tasks.
• Support 24x7 standby duties as required.

Skills

IT infrastructure

Information security

Windows

RHEL

Networking

Incident management

Vendor management

Communication

OT experience

Job description

Title: Senior Systems and Network Engineer

Job ID: 22662

Location: ST Engineering Jurong East Bui, SG

Description

Join ST Engineering Info-Security Pte. Ltd. within the Infrastructure Sustainment Services Business Unit, Customer Success Division, as a Senior Systems and Network Engineer. This pivotal role is designed for a seasoned IT professional dedicated to maintaining and enhancing the reliability, security, and efficiency of enterprise IT infrastructures for our valued clients.

As a Senior Engineer, you will be instrumental in ensuring that complex network environments and IT systems remain resilient and secure, thereby enabling uninterrupted business operations. Your role will involve proactive management of IT infrastructure, swift resolution of incidents, and continuous improvement of system performance and security protocols.

Key Responsibilities

• Lead and manage root-cause analysis initiatives, spearheading the resolution of complex technical incidents and serving as a critical escalation point for infrastructure-related issues.
• Conduct preventive and corrective maintenance on diverse IT infrastructure components, including servers, network devices (firewalls, load balancers, switches), and operating systems such as Windows and Red Hat Enterprise Linux (RHEL), ensuring optimal service availability and stability.
• Execute incident and problem management processes in alignment with organisational standards, facilitating timely restoration of services within agreed Service Level Agreements (SLAs).
• Provide expert advice to clients on performance enhancement, capacity planning, and optimization strategies to improve overall infrastructure efficiency.
• Implement and manage security controls encompassing patch management, vulnerability remediation, access control, system hardening, in strict adherence to clients’ security policies and industry best practices.
• Ensure rigorous application of security patches and updates following established Change and Release Management protocols to uphold system integrity and robust security postures.
• Maintain comprehensive and up-to-date documentation, including system configurations, SOPs, maintenance and recovery procedures, along with detailed incident and problem records. Generate insightful operational and security reports, such as incident post-mortems and Root Cause Analyses, to support transparent communication with management and clients.
• Collaborate closely with client teams, internal departments, and external service providers to guarantee integrated IT and Operational Technology (OT) operations. Coordinate activities related to audits, incidents, changes, and Disaster Recovery exercises.
• Communicate technical risks, service impacts, and recommended solutions effectively to stakeholders, including non-technical audiences, ensuring clarity and awareness.
• Demonstrate autonomous working capabilities, effective prioritisation, accountability, and ownership of assigned tasks and improvement initiatives.
• Provide support for 24×7 standby duties, ensuring continuous coverage and availability as required by operational demands.

Skills And Qualifications

• A minimum of 6 to 8 years’ experience in IT infrastructure management and/or information security within enterprise or customer-centric environments, demonstrating a thorough understanding and capability in managing complex systems.
• Deep expertise in IT infrastructure components, including hardware, software, operating systems, networking, and security principles.
• Proven track record in IT operations management encompassing system administration, patch management, and performance monitoring.
• Strong proficiency in Windows and RHEL operating systems, network technologies such as firewalls, switches, and load balancers, and related network services.
• Exceptional problem-solving skills combined with excellent communication and stakeholder management abilities, capable of articulating complex technical concepts to diverse audiences.
• Demonstrated capability in vendor management and a proactive attitude towards continuous learning and adoption of emerging technologies and methodologies.
• Experience working with Operational Technology (OT) environments is considered an advantage, highlighting adaptability to varied infrastructure domains.
• Ability to support and contribute to round-the-clock standby duties ensuring operational excellence.

Why Join Us?

At ST Engineering Info-Security, we are committed to creating an inclusive and dynamic workplace where innovation and collaboration thrive. As part of our Customer Success Division, you will engage with a diverse team of professionals dedicated to delivering exceptional IT infrastructure services that safeguard and empower our clients' operations.

We value continuous professional development, offering opportunities to enhance your expertise within a supportive environment. Your contributions will directly influence the robustness of critical IT environments, making a tangible impact on business continuity and security.

Work location: Jurong East