IT Infrastructure & Security Specialist (Focus Linux Server)

In your role, you will ensure the high availability, stability, and security of enterprise Linux systems supporting mission critical production environments. You will operate, maintain, and optimize Linux platforms, taking responsibility for OS and kernel patching, performance tuning, troubleshooting, and automation of operational processes. Working in close collaboration with global IT and infrastructure teams, you will contribute to reliable system operations, lifecycle management, and continuous improvement of enterprise computing environments.

• Administer, maintain, and troubleshoot large-scale Linux environments (RHEL, CentOS, Ubuntu)
• Perform OS and kernel patching across production and non-production systems with minimal downtime
• Troubleshoot complex Linux issues, including boot failures, initramfs issues, filesystem corruption, OOM events, and performance degradation
• Perform deep-dive analysis of CPU, memory, disk I/O, and networking issues
• Handle production incidents, perform RCA, and implement permanent fixes
• Develop and maintain shell scripts for automation, health checks, and validations
• Collaborate closely with application, storage, and network teams
• Maintain documentation, runbooks, and patching procedures

• Degree in IT, Computer Science, or Network Engineering
• Proven experience in Linux system administration within enterprise environments
• Deep understanding of Linux internals, including the boot process, systemd, services, and process management
• Strong knowledge of memory management, OOM behavior, swap, and caching mechanisms
• Extensive experience with OS and kernel patching in production and mission-critical systems
• Proven ability to troubleshoot complex Linux issues under time-critical conditions
• Strong shell scripting skills (Bash) for automation and operational tasks
• Exposure to virtualization and container technologies such as VMware vSphere or Kubernetes is considered a plus
• Familiarity with automation or monitoring tools (e.g., Ansible, CheckMK) is an advantage

• A meaningful role with opportunities for long-term growth in an international environment
• Chance to actively contribute to AT&S’ success and to create value
• A structured and tailor-made onboarding program along with continual training opportunities
• Modern company canteen with freshly prepared meals every day
• Free parking spaces and e-charging stations
• Diverse health measures and a wide range of employee benefits

AT&S is an equal opportunity employer. We embrace diversity and are dedicated to empowering people to reach their potential by fostering their unique talents and strengths. The employment is in accordance with the Austrian Collective Agreement for the Electrical and Electronics Industry ( ), employment group E-F, and we offer competitive salaries and additional benefits based on your performance, experience and qualification.

AT&S is a leading global manufacturer of high-end IC substrates and printed circuit boards. AT&S industrializes leading-edge technologies for its core business segments Mobile Devices & Substrates, Automotive & Aerospace, Industrial and Medical and high-performance computing for AI applications. We are looking for talent eager to shape the future of our interconnected world. With plants in Austria, China, India, Malaysia and sales offices around the globe, we offer excellent career opportunities for creators, innovators and enablers with the drive to make a difference.