Infoplus Technologies UK Limited
Linux Administrator
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Job title: Linux Administrator
Will the role be 100% remote, hybrid or 100% office?
Hybrid 3 Days/Week
If the role is hybrid/ office based specify location:
Stevenage, UK
Duration of assignment:
6 months contract InsideIR35
The Role:
We are seeking an experienced Senior HPC Engineer with a minimum of 10 years in enterprise IT, including significant hands-on experience in High-Performance Computing (HPC) environments. The successful candidate will be responsible for managing, securing, and maintaining our Red Hat Enterprise Linux (RHEL) infrastructure across versions 7, 8, and 9, with a strong focus on HPC workload management, scientific application support, and direct collaboration with research scientists.
This role sits within a team responsible for delivering and sustaining the scientific computing environment. The ideal candidate thrives in a research-driven setting, is comfortable working alongside scientists, and brings both deep technical expertise and strong interpersonal skills to solve complex problems in a collaborative manner.
Key responsibilities:
HPC Infrastructure & Linux Administration:
- Administer, configure, patch, and maintain RHEL 7, 8, and 9 environments, ensuring system stability, performance, and security across HPC clusters and high-end workstations.
- Deploy, configure, and manage the Slurm workload manager, including job scheduling, queue management, partition configuration, and fair-share policies.
- Monitor cluster health, resource utilisation, and job throughput, implementing performance tuning as required.
- Manage cluster networking, storage mounts and interconnects relevant to HPC workloads.
Scientific Application Support:
- Install, configure, and maintain scientific software packages, compilers, libraries, and MPI stacks required by research teams.
- Work closely with scientists to understand their computational needs and translate these into appropriate HPC configurations and workflows.
- Diagnose and resolve application-level issues, liaising with software vendors and developers where necessary.
- Assist scientists in optimising their jobs for efficient use of cluster resources.
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Troubleshooting and Support:
- Provide expert-level troubleshooting for complex hardware, operating system, scheduler, and application issues across the HPC environment.
- Respond to and resolve user-reported issues in a timely manner, maintaining high satisfaction among scientific users.
- Track incidents, problems, and service requests using ServiceNow, ensuring appropriate prioritisation and clear communication with stakeholders.
- Participate in root cause analysis and implement preventive measures to reduce recurring issues.
Collaboration and Stakeholder Engagement:
- Work as an integral member of a team responsible for managing scientific computing infrastructure and applications.
- Build productive working relationships with research scientists, translating scientific requirements into practical infrastructure and application solutions.
- Collaborate with other technical teams (networking, storage, security, DevOps) to deliver cohesive and reliable HPC services.
- Communicate technical concepts clearly to both technical peers and non-technical scientific stakeholders.
- Manage and coordinate with hardware and software vendors to optimise service delivery.
Key skills/knowledge/experience:
- Experience: A minimum of 10 years in an enterprise IT environment, with at least 3–5 years in an HPC or research computing role.
- Linux Expertise: Extensive hands-on administration and troubleshooting experience with Red Hat Enterprise Linux (RHEL), specifically versions 7, 8, and 9.
- HPC & Slurm: Proven, hands-on experience with HPC cluster management, including deployment, configuration, and ongoing operation of the Slurm workload manager.
- Scientific Application Support: Demonstrated experience supporting scientific or research software in a Linux HPC environment.
- Troubleshooting: Strong and demonstrable skills in diagnosing and resolving complex hardware, OS, scheduler, and application-level issues under pressure.
- Service Management: Working knowledge of ServiceNow or an equivalent ITSM platform for incident, problem, and change management.
- Collaboration: Proven ability to work as part of a team and engage directly with research scientists to support their computational workflows.
- Communication: Excellent interpersonal and communication skills, with the ability to explain technical concepts to non-technical users.
- Onsite Presence: Ability to work onsite for a minimum of 3 days per week and be available at short notice to support physical systems.
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Desirable skills/knowledge/experience:
- Familiarity with container technologies (Docker) in an HPC context.
- Experience with configuration management tools such as Ansible.
- Knowledge of GPU computing, CUDA, and supporting GPU-accelerated workloads on RHEL.
- Understanding of MPI libraries (OpenMPI, MPICH) and their interaction with Slurm.
- Familiarity with networking concepts including InfiniBand or high-speed Ethernet in HPC environments.
- Experience with web server configuration and SSL certificate management.
- Red Hat certifications (RHCSA, RHCE) or equivalent.
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