Senior Unix/Linux Sysadmin – DR/RCAs & 24x7 On-Call

TEAMLEASE DIGITAL SOLUTIONS PTE. LTD.; Singapore; On-site; SGD 70,000 - 120,000; Full time

Job summary

TEAMLEASE DIGITAL SOLUTIONS PTE. LTD. is seeking a skilled Unix/Linux Administrator with 6–8 years of experience to manage enterprise environments, including Red Hat, AIX, and Solaris.

The role emphasizes system resilience, DR testing, and RCA of incidents in a demanding production setting. You will coordinate across application, database, network, and storage teams, maintain documentation, and provide 24x7 on-call support to ensure business continuity.

Qualifications

• Degree/Diploma in Information Technology or Computer Science or equivalent.
• 6-8 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 minimise downtime and support business continuity.
• Troubleshoot OS, CPU, memory, filesystem, network, and performance-related issues.
• Manage production incidents and participate in incident recovery and root cause analysis.
• Conduct Disaster Recovery (DR) testing in coordination with business and infrastructure teams.
• Monitor server health, capacity, availability, and performance.
• Involved in Root Cause Analysis (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 infrastructure teams.
• Maintain operational procedures, technical documentation, and knowledge articles.
• Provide 24x7 on-call support during assigned shifts and respond to severity 1 incidents under pressure.
• Communicate effectively with stakeholders during high-impact incidents and recovery efforts.
• Work with L1 to monitor system performance and proactively address potential issues.

Skills

Unix/Linux administration

Production support

Incident management

Shell scripting

Root Cause Analysis

Communication

ITIL knowledge

Education

Degree/Diploma in IT/CS

Tools

VMware ESX

Geneos

Splunk

Job description

TEAMLEASE DIGITAL SOLUTIONS PTE. LTD. is seeking a skilled Unix/Linux Administrator with 6–8 years of experience to manage enterprise environments, including Red Hat, AIX, and Solaris.

The role emphasizes system resilience, DR testing, and RCA of incidents in a demanding production setting. You will coordinate across application, database, network, and storage teams, maintain documentation, and provide 24x7 on-call support to ensure business continuity.