HPC Systems & Scheduler Administrator #26-27411

• The HPC Systems & Scheduler Administrator is a senior-level technical specialist responsible for the Linux systems administration, Slurm workload management, and Linux Virtual Desktop (VDI) environment supporting Client's enterprise HPC. Embedded within the ADT organization and working in close collaboration with the DT team, the engineer will be a primary technical owner of the scheduler and Linux OS layer of the HPC stack, driving system reliability, throughput, and user experience.

• Manage OS-level configuration, patching, and hardening of HPC compute nodes, login nodes, and head nodes; ensure stability and security compliance in coordination with DT's cybersecurity policies.

• Serve as the primary subject matter expert for the Slurm workload manager; manage partition configurations, node scheduling policies, fairshare/priority weighting, reservation management, and Quality of Service (QoS) tiers.

• Manage environment module frameworks (e.g., Lmod/Environment Modules), compiler toolchains, MPI libraries, and application runtime environments in support of engineering simulation codes.

• Administer and maintain Linux Virtual Desktop environment; manage image lifecycle, user session management, OS configuration standardization, and application delivery to Linux desktop users.

• Deploy and maintain comprehensive system monitoring (e.g., Ganglia, Grafana/Prometheus, CloudWatch) for compute, scheduler, and Linux VDI environments; establish alerting thresholds and on-call response protocols with DT.

• Design and tune scheduling configurations to maximize throughput and minimize queue latency; develop strategy to prioritize HPC usage across user community and reduce queue times.

• Profile and tune system-level performance bottlenecks including network fabric (e.g., EFA/InfiniBand), I/O subsystems, and memory bandwidth; collaborate with the HPC Performance Engineer on application-level profiling.

• Support Linux-side user provisioning, group management, SSH key governance, and sudo/privilege management in collaboration with DT's identity management processes.

• Advanced Linux administration skills (RHEL/CentOS/Rocky Linux ecosystem preferred)
• Deep expertise with Slurm Workload Manager (configuration, troubleshooting, performance tuning)
• Demonstrated experience administering Linux virtual desktops or thin-client environments
• Experience managing environment modules, compiler toolchains, and MPI runtimes (OpenMPI, Intel MPI, etc.)
• Experience with HPC networking concepts (latency optimization, MPI tuning, high interconnects)
• HPC Linux systems administration experience in a production environment
• Proficiency with system monitoring and observability tooling

• AWS cloud HPC experience (AWS ParallelCluster, EC2 HPC instances, EFA networking)
• Experience contributing to or supporting a CI/CD pipeline for HPC configurations
• Familiarity with GPU compute environments (CUDA runtime, GPU partitioning in Slurm)
• Knowledge of cybersecurity hardening standards for Linux HPC
• Scripting proficiency in Python, Bash, or Ansible for automation

• This role requires access to U.S. export-controlled information. If applicable, final offers will be contingent on ability to obtain authorization for access to U.S. export-controlled information from the U.S. Government.

About US Tech Solutions:
US Tech Solutions is a global staff augmentation firm providing a wide range of talent on-demand and total workforce solutions. To know more about US Tech Solutions, please visit www.ustechsolutions.com.

US Tech Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

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