Junior HPC System Administrator

📋 Job Overview

GRNET S.A. provides Internet connectivity, high-quality e-Infrastructures and advanced services to the Greek Educational, Academic and Research community, aiming at minimizing the digital divide and at ensuring equal participation of its members in the global Society of Knowledge. GRNET provides advanced services to the following sectors: Education, Research, Health, Culture. In early 2026, GRNET is expected to host the DAEDALUS supercomputer, which will be ranked among the top 30 fastest supercomputers worldwide and will also serve the Greek AI factory - Pharos with special needs for AI workflows.

We are currently looking for a passionate Junior HPC System Administrator to expand existing team capability on implementing and providing advanced operational support for systems.

🏢 About GRNET S.A.

GRNET S.A. provides Internet connectivity, high-quality e-Infrastructures and advanced services to the Greek Educational, Academic and Research community, aiming at minimizing the digital divide and at ensuring equal participation of its members in the global Society of Knowledge. GRNET provides advanced services to the following sectors: Education, Research, Health, Culture.

🎯 The Role

As a Junior HPC System Administrator you will contribute to the high availability and smooth operation of the HPC systems. Your role will include monitoring, automation, troubleshooting and user support. You will be part of a talented team that demonstrates superb technical competency, delivering mission critical services and ensuring the highest levels of availability, performance and security.

✅ Key Responsibilities

• Monitor system availability and respond to alerts
• Assist in automation of system configuration
• Troubleshoot issues with hardware, operating system and parallel file systems
• Respond to user support tickets
• Contribute to system documentation

📌 Required Qualifications

• Experience in Linux administration (especially RHEL and RHEL clones) and Linux command-line tools.
• Basic understanding of networking concepts (e.g., TCP/IP, DNS, firewalls).
• Experience with scripting languages (e.g., Bash, Python or Perl) for task automation.
• Familiarity with configuration management tools (e.g., Ansible).
• Exposure to monitoring tools (e.g., Nagios, Ganglia, Prometheus, Grafana).
• Experience in the use of ticketing / issue tracking and project management systems (e.g. Atlassian JIRA, Redmine, etc.)
• Good knowledge of Greek and English language.

⭐ Desirable Experience

• Basic understanding of HPC concepts, such as parallel computing and job scheduling
• Familiarity with job schedulers (e.g., SLURM, Torque) for managing compute workloads.
• Exposure to HPC hardware components (e.g., GPUs, InfiniBand, parallel file systems like Lustre or GPFS).
• MSc or PhD in Computer Engineering or Computer Science.
• 2-year experience in a relevant field (HPC environment).

🎁 Benefits

• Opportunities for International collaborations
• Competitive remuneration package
• Opportunities for professional development
• Modern, friendly and innovative working environment

🛂 Visa & Eligibility

• GRNET is an equal opportunity employer that is committed to diversity and inclusion in the workplace. People with a diverse range of backgrounds are encouraged to apply. We do not discriminate against any person based upon their race, age, color, gender identity and expression, disability, national origin, medical conditions, religion, parental status, or any other characteristics protected by law.