Senior Unix / Linux System Administrator - Toa Payoh

The ideal candidate will have deep technical expertise in Unix/Linux administration, middleware support, and IT infrastructure operations, with a strong focus on reliability, automation, and continuous improvement.

Key Responsibilities

• Perform administration and maintenance of Sun Solaris and Linux-based servers across production, DR, and test environments.
• Upgrade, patch, and harden operating systems and middleware to ensure compliance and security.
• Manage password and certificate renewals, infrastructure component obsolescence, and system backups.
• Design, implement, and test disaster recovery and business continuity strategies.
• Manage and maintain UAT environments, ensuring availability for testing and project support.
• Develop and maintain technical documentation for systems, middleware, and infrastructure.
• Provide advanced (Level 3) technical support and guidance to end-users and IT teams.

• Resolve incidents and service requests in line with SLAs.
• Perform root cause analysis and implement preventive measures to improve service stability.

• Plan, schedule, and implement system changes following established change management processes.
• Package and deploy application changes using deployment tools.

• Maintain a comprehensive system configuration database (CMDB).
• Monitor infrastructure capacity and optimize system performance through tuning and proactive planning.

• Design and implement IT service management processes aligned with corporate security standards.
• Support infrastructure enhancement initiatives and provide system support for projects.

• Maintain up-to-date technical, operational, and process documentation.

• Bachelor’s degree in Information Technology, Computer Science, or related discipline.
• 8+ years of experience in system administration with strong expertise in Unix/Linux (Solaris, Red Hat, or similar).
• Hands-on experience with SAN storage for Unix/Linux platforms.
• Skilled in OS hardening, patching, and enterprise backup solutions.
• Experience with monitoring and management tools for large-scale environments.
• Proficient in scripting (Shell, Perl, or Python) for automation and system tasks.
• Familiarity with database administration and data center operations (advantageous).
• Ability to provide 24/7 on-call support on a rostered basis and after-hours support for critical changes.
• Strong communication skills with the ability to influence and collaborate across teams and levels.
• Excellent problem-solving, analytical, and troubleshooting skills.
• Proactive, customer-focused, and resilient in fast-paced environments.
• Relevant certifications:

Cloud administration certifications (AWS, Azure, or GCP) (preferred)

Interested applicants, please email your updated CV to Angelica DY at [email protected].

Only shortlisted applicants will be notified.