OS Admin

Role Overview

The OS Administrator is responsible for installing, configuring, securing, and maintaining operating systems across servers and enterprise environments. The role ensures system stability, security, and performance by managing day-to-day operations, troubleshooting incidents, and supporting infrastructure upgrades.

Technical Skills Required

Linux Administration

• Strong hands-on experience with RHEL/CentOS/Oracle Linux.
• User, process, memory, and file system management.
• Shell scripting and automation.
• Performance tuning and troubleshooting.
• Network and security administration in Linux environments.

Oracle Database Administration

• Oracle Database installation, configuration, and patching.
• Backup and recovery using RMAN.
• Database performance monitoring and tuning.
• User, schema, and privilege management.
• Experience with Oracle HA/DR solutions is preferred.

System Administration

• Install, configure, and maintain Windows / Linux / Unix servers.
• Manage user accounts, permissions, and system access in compliance with policies.
• Apply OS patches, upgrades, and security updates on a regular schedule.

Monitoring & Performance

• Monitor system performance, availability, and resource utilization.
• Conduct regular health checks and ensure compliance with SLAs.
• Troubleshoot OS-related issues and provide root cause analysis.

Security & Compliance

• Implement and maintain system security (hardening, access control, vulnerability patching).
• Support audits and compliance requirements
• Maintain system backup, recovery, and disaster recovery readiness.

Operations & Support

• Provide L2/L3 support for OS-related incidents.
• Automate routine tasks using scripts (Shell, PowerShell, Python).
• Maintain documentation of system configurations, SOPs, and changes.

Collaboration

• Work closely with network, storage, and application teams for issue resolution.
• Support infrastructure projects, migrations, and capacity planning.

Required Skills & Qualifications

• Bachelors degree in Computer Science, IT, Electronics, or related field.
• 35 years of experience in Linux / Windows / Unix administration.
• Strong knowledge of system performance tuning, patch management, and log analysis.
• Familiarity with virtualization platforms (VMware, Hyper-V, KVM).
• Understanding of security hardening, firewalls, and endpoint protection.
• Proficiency in scripting (Bash, PowerShell, Python preferred).

Key Responsibilities

• Provide L2 support for Linux servers and Oracle database environments.
• Troubleshoot and resolve production incidents within defined SLAs.
• Perform installation, configuration, patching, and upgrades of Linux servers and Oracle databases.
• Monitor system and database performance and implement optimization measures.
• Manage backup, recovery, and disaster recovery operations using RMAN.
• Conduct root cause analysis (RCA) for recurring incidents and recommend preventive actions.
• Support change management, release activities, and maintenance windows.
• Collaborate with application, infrastructure, and vendor teams for issue resolution.
• Maintain operational documentation, SOPs, and technical knowledge repositories.

Desired Candidate Profile

• 7-10 years of relevant experience in Linux and Oracle Database administration.
• Strong analytical and troubleshooting skills.
• Experience supporting large-scale production environments.
• Ability to work in a 24x7 support environment and handle critical incidents.
• Excellent communication and stakeholder management skill
• Certifications such as RHCSA / RHCE, MCSA / MCSE, CompTIA Linux+, VMware VCP.