Senior Linux System Administrator

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Job Description:

Job Description – Romania Linux System Administrator

The Linux System Administrator is responsible for the day-to-day operations, support, and lifecycle management of Linux infrastructure across global environments. This role focuses on maintaining stable, secure, and scalable systems with a strong emphasis on the Red Hat ecosystem, automation, and High-Performance Computing (HPC) platforms.

The administrator will support infrastructure architecture, implementation, monitoring, and continuous improvement of Linux systems, ensuring high availability and operational efficiency. This is a hands-on technical role requiring a self-motivated individual who can work independently with minimal supervision while effectively collaborating with peers, internal customers, and leadership teams.

Key Responsibilities

• Manage and support daily operations of Linux servers across global data centers
• Perform system provisioning, configuration, patching, and upgrades
• Install, configure, and maintain Linux servers (RHEL, CentOS, Ubuntu or similar distributions).
• Manage user accounts, file systems, permissions, and security policies.
• Monitor system performance, resource utilization, and troubleshoot OS-level issues.
• Implement and maintain automation using Shell / Python scripting, Configuration management tools like Ansible, Puppet.
• Manage storage, backup, disaster recovery, and system failover procedures.
• Maintain logs, audit trails, compliance documentation, and change management records.
• Work with Network teams for deployment and infrastructure improvements.
• Provide L2 support, root cause analysis, and performance optimization for Linux environments.

Requirements/Qualifications:

Required Skills & Expertise

• Strong knowledge of Linux internals, boot process, file systems & networking concepts.
• Perform advanced troubleshooting and resolution of Linux OS–related incidents, including performance, kernel, boot, storage, and network issues.
• Hands-on experience in RHEL/CentOS/Ubuntu administration.
• Expertise in Shell scripting / Bash, and automation tools (Ansible preferred).
• Experience with system monitoring tools like Nagios, Grafana, Zabbix.
• Strong understanding of TCP/IP, DNS, DHCP, SSH, Firewalls, Load Balancers.
• Strong troubleshooting, analytical, and problem-solving skills.
• Experience with Git,CI/CD, and DevOps workflows is desirable.
• Ability to manage production outages, troubleshoot performance issues, and optimize infrastructure.
• Knowledge of system performance monitoring and optimization.
• Handle L2-level ServiceNow tickets, including incident, request, and change management tasks.
• Familiarity with network infrastructure and security best practice.
• Support virtual desktop infrastructure (VDI) operations including provisioning, reconfiguration, and performance tuning.
• Maintain documentation of systems, procedures, and troubleshooting guidelines.
• Collaborate with L3 and architecture teams for environment improvements and automation initiatives.
• Bachelor's degree in computer science or a related field is often preferred

Basic Hardware & Datacenter Activities:

• Server racking & stacking
• Hardware lifecycle tasks (RAID config, BIOS/ILO/iDRAC config, firmware update)
• Physical troubleshooting (disk replace, memory replace, Power supply replaces)
• Call logging with the OEM in case of any hardware failures.
• Datacenter Best Practices (Asset Tracking, Warranty Tracking, Power (PDU’s) , Cooling, Cabling Standards)

Soft Skills

• Strong analytical and problem-solving skills.
• Good communication & documentation abilities.
• Ability to work independently and in a collaborative team
• Willingness to work in rotational shifts or On-Call support.
• Ability to prioritize and manage multiple tasks under pressure.
• Proactive attitude with a focus on continuous improvement.

Travel Time:

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