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Jobs in Singapore   »   Jobs in Singapore   »   Information Technology Job   »   Senior System Administrator
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Senior System Administrator

Opensource Pte. Ltd.

Opensource Pte. Ltd. company logo

Position Summary

The incumbent will provide support to the Manager, INFSVC, assisting with IT infrastructure services strategies and managing infrastructure-related issues that directly or indirectly impact business performance. This includes evaluating, conceptualizing, developing, implementing, maintaining, and supporting IT infrastructure systems. The role also involves achieving short-term operational targets within the INFSVC division, with a fair degree of autonomy to review and improve work processes. Additionally, the incumbent may guide junior-level staff within a defined job area.

Key Responsibilities

System Administration

  • Administer and maintain systems in a heterogeneous environment (production, DR, test) comprising Oracle and Wintel-based servers.
  • Perform system upgrades and enhancements on IT infrastructure components.
  • Implement operating system and product-specific security hardening and patches.
  • Monitor the obsolescence of IT infrastructure components (systems).
  • Monitor expiry and renew system passwords and certificates.
  • Ensure system backups for data recoverability and business continuity.
  • Execute disaster recovery plans for IT infrastructure (systems) and conduct regular disaster recovery testing and switchover exercises.
  • Manage the application User Acceptance Test (UAT) and maintain the UAT environment.

Incident & Problem Management

  • Provide 2nd level system support and resolve incidents and problems per established Service Level Agreements (SLA).
  • Diagnose incidents, propose, and implement measures to prevent recurrence.

Change & Release Management

  • Schedule and release system changes to production environments following change management processes and procedures.
  • Support application deployment for application changes as per release notes.

Configuration Management

  • Maintain the configuration information of IT infrastructure components in the production environment.

Capacity & Performance Management

  • Monitor infrastructure capacity and report monthly.
  • Monitor and perform performance tuning to optimize system performance when needed.

Process Management

  • Develop and implement processes supporting IT service management, aligning with corporate security policies and guidelines.

Project Management & Support

  • Provide infrastructure (system) support for projects in line with project timelines.
  • Manage infrastructure enhancement/upgrade projects per established project management guidelines.

Documentation

  • Develop and maintain technical and process documentation to support IT infrastructure when required.

Requirements

Academic Criteria & Professional Certification

  • Diploma or Bachelor’s Degree in Information Technology or a related discipline.
  • Oracle Certified System Administrator certification (Optional).
  • RHEL Certified System Administrator certification (Optional).

Experience and Technical Skills

  • Minimum 3-4 years of experience in system administration and support on Unix and/or RHEL.
  • Experience in performing OS hardening and patching for Unix and/or RHEL.
  • Experience with VMWare technologies.
  • Proficiency in scripting for Unix and/or RHEL environments to automate tasks (including Python and YAML scripting).
  • Experience in administration and support of SAN (Optional).
  • Experience with backup & management software (Optional).
  • Experience in middleware (e.g., IBM MQ, IBM Connect Direct, JBoss Web Server) (Optional).
  • Experience with management and automation software (Satellite, Ansible) (Optional).

Attributes

  • Strong written and verbal communication skills.
  • Good interpersonal skills and the ability to work independently and in a team.
  • Demonstrate analytical and problem-solving abilities.
  • Customer-oriented mindset.
  • Initiative and the ability to multi-task.
  • Familiarity with data center operations.
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