HPC User Support Specialist
About the job
- Experience using Linux environments and command-line tools.
- Familiarity with high-performance computing concepts such as modules, batch systems, job schedulers, and parallel computing.
- Exposure to high-performance computing job schedulers, preferably Slurm.
- Understanding of scientific computing workflows and common programming languages such as Python, C/C++, Fortran, and R.
- Experience with high-performance computing application execution or user support in a technical environment.
- Interest or experience in performance profiling using tools such as gprof, perf, Intel VTune, or ARM MAP.
- Ability to troubleshoot issues involving jobs, user environments, or software modules.
- Experience with ticketing or issue-tracking tools such as JIRA, Redmine, or ServiceNow.
- Good knowledge of Greek and English.
- Excellent communication skills and ability to support users with varying levels of expertise.
- Team-oriented mindset and willingness to collaborate across roles.
- Strong problem-solving skills and analytical thinking.
- Motivation to learn new technologies and understand scientific applications.
- Reliability, adaptability, and commitment to providing a high level of service.
- Enthusiasm, persistence, and willingness to deliver results on time.
- Respond to and resolve high-performance computing user support tickets.
- Assist users with job submission, scheduling, and workflow optimization.
- Support users in accessing systems, storage, and high-performance computing software environments.
- Investigate and troubleshoot issues related to jobs, applications, and resource usage.
- Help users improve workload performance, including profiling and basic code optimization support.
- Run and analyze application benchmarks and scaling tests to identify performance bottlenecks.
- Contribute to onboarding, user guides, and technical documentation.
- Participate in user training activities, including webinars, tutorials, and hands-on sessions.
- Collaborate with system administrators to identify and resolve system-side issues affecting users.
- Provide feedback to improve high-performance computing services and user experience.
- Hands-on experience running workloads on high-performance computing systems.
- Familiarity with profiling and performance-tuning tools.
- Experience with containers for high-performance computing, such as Apptainer or Singularity.
- Knowledge of parallel programming, including MPI and OpenMP.
- Exposure to scientific domains such as computational physics, artificial intelligence and machine learning, or bioinformatics.
- Experience preparing training material or teaching technical subjects.
- A Master of Science or PhD in a STEM field.
About the company
GRNET provides networking and cloud computing services to Greece’s academic, research, educational, and public sectors. It runs a nationwide fiber optic network, large data centers, and high-performance computing, delivering internet, cloud, authentication, security, and multimedia services to interconnect universities, research centers, hospitals, schools, cultural institutions, and government bodies. As a national coordinator of education and research e-infrastructures with government backing and EU funding, it differentiates itself by scale, mandate, and long experience. Its goal is to support digital governance and advance Greece’s research and education by offering reliable, scalable ICT infrastructure and services.
Company Size
51-200
Company Stage
N/A
Total Funding
N/A
Headquarters
Athens, Greece
Founded
1998
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Simplify's Take
What believers are saying
- DAEDALUS reached 85.69 petaflops and 23rd on Green500 on June 23, 2026.
- PHAROS launched with a 30 million euro budget, half funded by EuroHPC.
- GRNET expanded cybersecurity and cloud-native public-service work through SONIC in June 2026.
What critics are saying
- The fiber-lease IRU expires June 30, 2026; service continuity depends on renewal.
- DAEDALUS and PHAROS rely on EuroHPC and national funding through 2028 and 2029.
- GRNET’s state dependence makes budget cuts or procurement delays immediately disruptive.
What makes GRNET unique
- GRNET runs DAEDALUS, Greece’s most powerful supercomputer, ranked 31st globally on June 23, 2026.
- GRNET coordinates PHAROS AI Factory, linking national HPC, AI, and Greek-language services.
- GRNET operates Greece’s national research network serving universities, schools, hospitals, and public bodies.
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Benefits
Remote Work Options
Professional Development Budget
Company News
GRNET at BEYOND 2026: Advancing AI, HPC and Quantum Innovation. * July 13, 2026 * * * GRNET - National Infrastructures for Research and Technology, operating under the auspices of the Ministry of Digital Governance and Artificial Intelligence, successfully participated in BEYOND 2026, the International Digital Technology & Innovation Exhibition, held 17-19 June 2026 at the Metropolitan Expo in Athens. Located within the Ministry of Digital Governance and Artificial Intelligence pavilion, GRNET showcased a portfolio of strategic national and European initiatives through audiovisual presentations and informational material. Visitors were introduced to flagship projects and infrastructures spanning High-Performance Computing (HPC), Artificial Intelligence (AI), including PHAROS AI Factory, DAEDALUS supercomputer and EuroCC@Greece, advanced networking projects like HEPHAESTUS and MACHAON, quantum communication infrastructure including projects of HellasQCI and SEEWQCI. Throughout the three-day event, GRNET representatives actively contributed to a series of panel discussions addressing critical topics related to Artificial Intelligence, High-Performance Computing, quantum technologies, digital healthcare, cybersecurity, research infrastructures and Greece's digital future. Stefanos Kollias, Chairman of GRNET and Professor Emeritus at the National Technical University of Athens (NTUA), joined experts from government, academia and industry in three discussions exploring Artificial Intelligence, digital health, digital infrastructure and Greece's digital future. His participation included the sessions "Healing with Data: AI, Digital Infrastructure and the Future of Greek Healthcare" (17 June), "Digital Greece: The Next Steps and Challenges for the Country's Digital Transformation" and "Computing for Greece: The National AI Infrastructure That Will Define the Next Decade" (both on 18 June). Across the sessions, Professor Kollias highlighted the transformative role of advanced digital infrastructures in strengthening research, innovation and public services, while emphasizing the strategic importance of PHAROS AI Factory and DAEDALUS supercomputer in building a national AI ecosystem that supports scientific excellence, technological competitiveness and digital sovereignty in Greece and Europe. He also underlined the growing impact of data-driven innovation and Artificial Intelligence in healthcare, as well as the importance of sustained investment in digital infrastructure to accelerate Greece's digital transformation. Dimitris Katsianis, Deputy Chairman of GRNET and Assistant Professor at the National and Kapodistrian University of Athens (NKUA), participated in the panel discussion "Quantum Computing: Challenges and Opportunities", highlighting GRNET's leading role in advancing quantum communication infrastructures through the HellasQCI and SEEWQCI initiatives and their contribution to the broader EuroQCI ecosystem. The discussion also explored the convergence of quantum technologies, High-Performance Computing and Artificial Intelligence, emphasizing the importance of secure quantum communications and the opportunities emerging from the integration of quantum and HPC infrastructures. Professor Katsianis also delivered the welcome remarks during the session "Region of Central Macedonia: Strategic Partnerships with Government Bodies for Research and Innovation", highlighting the importance of collaboration between public bodies, academia and technology providers in advancing research and innovation. Panos Louridas, Director of GRNET's Research & Development Directorate and Professor at the Department of Management Science and Technology of the Athens University of Economics and Business (AUEB), participated in the same session, delivering the opening speech entitled "Manna from Heaven? GRNET's Provision of Resources to the Greek Academic and Research Community" and moderating the thematic discussion "Nurturing Domestic AI". The session focused on the value of strategic collaborations between public organisations, academia, research institutions and technology providers in advancing Artificial Intelligence, High-Performance Computing and cloud-enabled innovation. Particular attention was given to the contribution of PHAROS AI Factory and advanced digital infrastructures in strengthening Greece's AI ecosystem and supporting regional development, innovation and research excellence. GRNET's presence at BEYOND 2026 underscored its role as a key enabler of Greece's digital future, connecting cutting-edge technologies, research excellence and innovation. Through its participation in major national and European initiatives, GRNET continues to advance digital transformation by developing world-class infrastructures and services that drive scientific progress, technological innovation and sustainable growth in Greece and beyond.
Dimitris Mitropoulos from GRNET participates at SONIC Project stakeholder event, 11/6/2026. * June 17, 2026 * * * GRNET participated in the SONIC Project stakeholder event on 11/6 in Athens, joining leading experts, researchers, policymakers, and infrastructure providers in discussions on the future of cybersecurity in Europe. Dimitris Mitropoulos, Head of the Reliability Engineering Directorate at GRNET & Associate Professor at NKUA, shared valuable insights on safeguarding public digital services and critical infrastructures at scale. During his talk, he presented GRNET's cloud-native platform that supports Greek government services, discussing its architecture and key capabilities for reliability, scalability, observability, and security. Through real-world use cases and operational experiences, he demonstrated how modern engineering practices enable the delivery of resilient and secure public-sector digital services. He also discussed innovative approaches for analyzing software security across complex technology stacks, highlighting recent advances that help organizations better understand software dependencies, identify potential risks, and strengthen the security posture of large-scale systems. The stakeholder event served as a valuable platform for dialogue among key actors in the cybersecurity landscape, highlighting the need for coordinated efforts to address emerging cyber threats and strengthen Europe's digital resilience. Participants explored current challenges and opportunities in cybersecurity, emphasizing the role of research, innovation, and cross-sector cooperation in building a safer digital future. GRNET's participation reflects its ongoing commitment to supporting initiatives that advance cybersecurity capabilities, foster knowledge sharing, and contribute to the development of secure and trusted digital infrastructures at both national and European levels.
GRNET at the "Artificial Intelligence in Engineering" Conference in Kozani. * May 19, 2026 * * * GRNET participated in the conference "Artificial Intelligence in Engineering: Innovation and Applications for Western Macedonia", organized by the Technical Chamber of Greece (TEE) / Department of Western Macedonia, held on 9 May 2026 in Kozani, under the auspices of the Ministry of Digital Governance and Artificial Intelligence. Throughout the conference sessions, discussions highlighted the prospects of leveraging Artificial Intelligence across critical sectors such as engineering, technical works, infrastructure, energy, and the developmental transition of Western Macedonia, fostering meaningful dialogue amongst scientific, institutional, and productive stakeholders, in the presence of the Minister of Digital Governance and Artificial Intelligence, Dimitris Papastergiou, and the Secretary General for Telecommunications and Posts, Konstantinos Karantzalos. Stefanos Kollias, Professor Emeritus at the National Technical University of Athens, Chairman of the Board of GRNET and Coordinator of the PHAROS AI Factory EU Project, participated in the session "Artificial Intelligence and Engineers: Quality, Standards, Technical Enterprises, New Techniques and Data". In his intervention, Prof. Kollias highlighted the ecosystem of national cutting-edge infrastructures being developed by GRNET in the fields of Artificial Intelligence (AI) and High-Performance Computing (HPC), focusing on PHAROS, the first Greek and one of the first European AI Factories, and the new national supercomputer "DAEDALUS", which is intended to serve as the computing platform of PHAROS for the development of advanced AI applications. Particular emphasis was also placed on the new AI Supercomputer in Western Macedonia, a project implemented by GRNET in collaboration with the University of Western Macedonia, at whose premises the new infrastructure will be hosted. As underlined during the discussion, the country's first AI-optimized supercomputer, operating in full synergy with "DAEDALUS" and "PHAROS", is expected to become an integral part of the national AI and HPC ecosystem, upgrading Western Macedonia into a strategic hub for innovation and advanced digital technologies, while further strengthening Greece's technological leadership and digital sovereignty. GRNET's participation in the conference reaffirms its strategic role in developing advanced national digital infrastructures, while continuously supporting innovation, research, and digital transformation at both regional and national level.
GRNET participated at the Potential interop event in Vilnius.
GRNET will participate at TNC25, GÉANT's flagship event and the leading conference for research and education networks, 9 - 13 June 2025 in Brighton, United Kingdom.