Senior Unix/Linux Systems Engineer - On-Call & DR Recovery

QUESS SINGAPORE; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

QUESS SINGAPORE is seeking an experienced Unix/Linux Systems Administrator to ensure high availability and performance of production environments in Singapore. You will handle incident management, DR testing, and cross-team collaboration across infrastructure domains.

The role requires 3–5 years of hands-on Unix/Linux administration, strong troubleshooting skills, and experience with LVM/filesystems, networking, and shell scripting.

Qualifications

• Degree/Diploma in Information Technology/Computer Science or equivalent.
• 3–5 years of Unix/Linux system administration and production support.
• Strong Unix/Linux administration and troubleshooting skills.
• Knowledge of filesystem/LVM, processes, services, networking, user administration, and shell scripting.
• Experience with Incident, Problem, and Change Management processes.
• Good analytical, troubleshooting, communication, and coordination skills.

Responsibilities

• Perform service recovery for Unix/Linux systems to minimize downtime and ensure business continuity.
• Troubleshoot OS, CPU, memory, filesystem, network, and performance-related issues.
• Manage production incidents and participate in incident recovery and RCA.
• Conduct Disaster Recovery testing with business and infrastructure teams.
• Monitor server health, capacity, availability, and performance.
• Involved in RCA investigations for critical incidents.
• Administer and maintain servers (Red Hat, AIX, Solaris) in production and DR environments.
• Coordinate with application, database, network, storage, and other teams.
• Maintain operational procedures, technical documentation, and knowledge articles.
• Provide 24x7 on-call support during assigned shifts and respond to severity 1 incidents.
• Communicate effectively with stakeholders during high-impact incidents and recovery efforts.
• Collaborate with L1 in monitoring system performance and proactive issue addressing.

Skills

Unix/Linux administration

Troubleshooting

Incident, Problem, Change Mgmt

Shell scripting

Networking

On-call support

Communication & coordination

Education

Degree/Diploma in IT/CS

Tools

Red Hat

AIX

Solaris

Job description

QUESS SINGAPORE is seeking an experienced Unix/Linux Systems Administrator to ensure high availability and performance of production environments in Singapore. You will handle incident management, DR testing, and cross-team collaboration across infrastructure domains.

The role requires 3–5 years of hands-on Unix/Linux administration, strong troubleshooting skills, and experience with LVM/filesystems, networking, and shell scripting.