System Engineer (Maintenance)

CERTIS GROUP - GHR; Singapore; On-site; SGD 60,000 - 80,000; Full time

Job summary

A leading outsourced services partner in Singapore is seeking an IT professional to manage OS security for Windows and Linux servers, administer network devices, and ensure compliance with industry standards. Candidates should have a diploma in Computer Science or a related field, with at least 3 years of IT experience, including 2 years in systems and security. The role offers competitive benefits and a chance to contribute to meaningful projects in a values-led workplace.

Benefits

Competitive remuneration package

Performance-based incentives

Comprehensive medical and dental coverage

Holistic wellness initiatives

Qualifications

• Minimum 3 years experience in the IT industry, with 2 years in systems and security.
• Hands-on experience in OS hardening, patching, and virus scanning is a plus.

Responsibilities

• Manage Windows & Linux Server environments and ensure they are updated.
• Administer and maintain network devices like routers and firewalls.
• Monitor network devices for uptime and performance.

Skills

Networking and IP/TCP protocol

Systems security knowledge

Good communication skills

Positive working attitude

Education

Diploma in Computer Science or IT related studies

Tools

AWS

Azure

Job description

About Certis

Certis is a leading outsourced services partner that designs, builds, and operates smart, integrated solutions across security, facilities management, and customer experience. Headquartered in Singapore with a growing presence in Australia and Qatar, we harness the power of technology—from AI to Robotics—to deliver critical services that protect lives and enable communities to thrive.

At Certis, your work has purpose. You’ll be part of a mission that goes beyond operations—shaping safer, smarter, and better outcomes for people and businesses. We offer diverse career pathways, invest in your growth, and empower you to make a meaningful difference.

If you're ready to build the future, your journey starts here—to us.

Life at Certis

Power a Smarter, Safer World with Tech: We build purposeful solutions that serve, protect, and empower—driven by trust, powered by people.

Shape the Future: Take charge of your development and offering diverse opportunities across roles, borders, and technologies. Work alongside leaders who invest in your potential, and a culture that will take you further.

Where Purpose Meets Possibility: From safeguarding communities to shaping smarter, more sustainable futures, we’re committed to creating long‑term value, not just for our customers, but for society and the environment.

Responsibilities

• Manage, patch, update, and perform OS hardening for Windows & Linux Server environments.
• Ensure that all servers and virtual machines (VMs) are regularly updated and running efficiently.
• Administer and maintain commercial network devices including routers, switches, and firewalls.
• Troubleshoot and resolve hardware and software issues related to network infrastructure.
• Assist in the maintenance and optimization of cloud environments in AWS and Azure.
• Perform regular checks and maintenance tasks on system/storage equipment. This includes ensuring optimal performance and identifying potential issues before they impact service.
• Ensure timely patching and updating of servers, VMs, and network devices, keeping systems secure and compliant with industry standards.
• Proactively monitor network devices and services, diagnose issues, and implement solutions
  to ensure uptime and optimal performance.
• Develop and maintain detailed system documentation for all infrastructure, including system configurations, network diagrams, and maintenance procedures.
• Respond promptly to incidents or issues affecting infrastructure, perform root cause analysis, and take corrective actions to prevent recurrence.
• Implement and follow security best practices for Windows & Linux Server and network devices.
• Ensure compliance with industry standards and internal policies.

Skills & Experience

• Minimum Diploma in Computer Science or IT related studies
• Minimum 3 years’ experience in IT industry with at least 2 years in systems & security arena.
• Knowledge of networking and IP/TCP protocol
• In‑depth knowledge in systems security issues
• Hands‑on experience in security‑related tasks such as OS tightening, patching and updating, virus scanning will be an added advantage.
• IT Certification in system & storage, network, database, virtualization, cloud technologies will be an added advantage
• Good communication skills and positive working attitude.

Recognition & Award

Be part of a purpose‑driven, values‑led workplace that fosters collaboration, respect, and a culture of continuous growth.

Enjoy a competitive remuneration package with performance‑based incentives and eligibility for annual bonuses.

Benefit from comprehensive medical and dental coverage, along with holistic wellness initiatives and dedicated mental health support.