We are seeking an experienced Senior Unix/Linux System Administrator to join our 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.
Key Responsibilities
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)
EA License no: 16S8066 | Registration No: R1110125
