Senior Unix

5 days ago

Singapore Charterhouse Pte Ltd Full time

Overview We are seeking an experienced Senior Unix / Linux System Administrator to join our client's technology team. This role will be responsible for ensuring the stability, security, and performance of our mission-critical systems across production, disaster recovery, and test environments. 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. System Administration & Operations 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. Incident & Problem Management Resolve incidents and service requests in line with SLAs. Perform root cause analysis and implement preventive measures to improve service stability. Change & Release Management Plan, schedule, and implement system changes following established change management processes. Package and deploy application changes using deployment tools. Configuration & Performance Management Maintain a comprehensive system configuration database (CMDB). Monitor infrastructure capacity and optimize system performance through tuning and proactive planning. Process & Project Support Design and implement IT service management processes aligned with corporate security standards. Support infrastructure enhancement initiatives and provide system support for projects. Documentation Maintain up-to-date technical, operational, and process documentation. Requirements 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: Unix/Linux System Administrator (required); Cloud administration certifications (AWS, Azure, or GCP) (preferred). Interested applicants, please email your updated CV to Angelica DY at Only shortlisted applicants will be notified. #J-18808-Ljbffr

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