Junior HPC System Administrator at GRNET S.A. · Athens

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.

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. The team members are professionals, with a mindset to innovate, automate, streamline, and provide value to GRNET and to the users of the offered services.

Your tasks

● 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

Your Profile

● 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.

Will be considered a plus:

● 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).

Personal Characteristics:

● Creativity, innovation spirit and team player.

● Dynamic personality, ability to accept challenges and undertake responsibilities.

● Enthusiasm, persistence and willingness to deliver results on time.

GRNET provides a creative, dynamic and challenging working environment, that encourages team spirit, cooperation and continuous learning of state-of-the-art technology.

● Opportunities for International collaborations

● Competitive remuneration package

● Opportunities for professional development

● Modern, friendly and innovative working environment

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.

All applications will be treated with strict confidentiality.