Senior Unix/Linux SysAdmin - DR, RCA & 24/7 On-Call

Quesscorp Singapore Pte Ltd

Singapore

On-site

SGD 80,000 - 120,000

Full time

4 days ago

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Job summary

Quesscorp Singapore Pte Ltd is seeking a skilled Unix/Linux Administrator with 6-8 years of hands-on experience to manage enterprise Unix/Linux environments, including Red Hat, AIX, and Solaris systems.

The role focuses on ensuring system resilience, DR testing, RCA of incidents, and coordinating with infrastructure teams. The candidate will provide 24x7 on-call support and maintain documentation for operational procedures, knowledge articles, and stakeholder communication.

Qualifications

6-8 years of hands-on Unix/Linux system administration and production support.
Strong Unix/Linux administration and troubleshooting skills.
Experience with filesystem/LVM, processes, services, networking, and user administration.

Responsibilities

Perform service recovery for Unix/Linux systems to minimize downtime.
Troubleshoot OS, CPU, memory, filesystem, network, and performance issues.
Manage production incidents and participate in incident recovery and RCA.
Conduct Disaster Recovery (DR) testing in coordination with infrastructure teams.
Monitor server health, capacity, availability and performance.
Provide 24x7 on-call support during assigned shifts and respond to severity 1 incidents.
Coordinate with application, database, network, and storage teams; maintain operational procedures and documentation.