Application Engineer II--Job ID: 4202

RISINGSUN TECHNOLOGIES; Greenville (SC); On-site; USD 61,000 - 87,000; Full time

Job summary

RISINGSUN TECHNOLOGIES in Greenville, SC is seeking a senior HPC Systems & Scheduler Administrator to own Linux OS, Slurm, and Linux Virtual Desktop infrastructure across an enterprise HPC environment. You will work with engineering, IT, cybersecurity and performance teams to improve reliability, throughput, and user experience, deploying monitoring, tuning, and security hardening as needed.

The ideal candidate brings strong production HPC administration experience and collaborates across teams

Qualifications

• Advanced Linux administration; prefer RHEL/CentOS/Rocky Linux.
• Slurm Workload Manager expertise: config, troubleshooting, tuning.
• Experience with Linux virtual desktops or thin clients.
• Environment modules, compilers, MPI runtimes (OpenMPI/Intel MPI).
• HPC networking concepts, latency optimization, MPI tuning.
• System monitoring and observability tools proficiency.

Responsibilities

• Linux Systems Administration: configure, patch, and harden HPC OS on compute, login, and headnodes.
• Slurm Scheduler Administration: manage Slurm config, troubleshoot, tune, QoS and partitions.
• HPC Application Environments: maintain modules, compilers, MPI runtimes for simulations.
• Linux Virtual Desktop Administration: manage desktop images, sessions, and app delivery.
• Monitoring and Alerting: deploy Ganglia, Grafana/Prometheus, CloudWatch; set alerts.
• Scheduler Optimization: tune policies to maximize throughput and reduce queue times.
• System Performance Optimization: resolve bottlenecks in network fabrics and I/O.
• User Access Management: manage provisioning, SSH keys, and sudo privileges with identity teams.

Skills

Advanced Linux administration

Slurm Workload Manager

Linux virtual desktops

Environment modules & MPI runtimes

HPC networking concepts

System monitoring & observability

Job description

Travel Required: No

Work Model: Onsite

Bill Rate: $54/hr

Hours: 40 hours/week

We are seeking a senior-level HPC Systems & Scheduler Administrator to support an enterprise high-performance computing environment. This role will serve as a primary technical owner of the Linux operating system, Slurm scheduler, and Linux Virtual Desktop infrastructure, helping improve system reliability, workload throughput, and user experience.

The ideal candidate brings strong production HPC administration experience and works effectively with engineering, IT, cybersecurity, and performance teams.

Key Responsibilities

• Linux Systems Administration: Manage operating system configuration, patching, and security hardening for HPC compute, login, and head nodes. Maintain stability and compliance with organizational cybersecurity policies.
• Slurm Scheduler Administration: Own Slurm configuration, troubleshooting, and performance tuning, including partitions, scheduling policies, fair-share allocation, priority weighting, reservations, and Quality of Service (QoS) tiers.
• HPC Application Environments: Maintain environment module frameworks such as Lmod or Environment Modules, compiler toolchains, MPI libraries, and runtime environments supporting engineering simulation applications.
• Linux Virtual Desktop Administration: Manage desktop images, user sessions, standardized operating system configurations, and application delivery.
• Monitoring and Alerting: Deploy and maintain monitoring tools such as Ganglia, Grafana/Prometheus, or CloudWatch across compute, scheduler, and virtual desktop environments. Establish alert thresholds and coordinate on-call response procedures with IT teams.
• Scheduler Optimization: Tune scheduling policies to maximize throughput, reduce queue times, and prioritize workloads across the user community.
• System Performance Optimization: Identify and resolve bottlenecks involving network fabrics such as EFA or InfiniBand, I/O subsystems, and memory bandwidth. Collaborate with performance engineers on application-level profiling.
• User Access Management: Support Linux user provisioning, group administration, SSH key governance, and sudo/privilege management in coordination with identity management teams.

Technical Skills — Must Have

• Advanced Linux administration skills; experience with the RHEL, CentOS, or Rocky Linux ecosystem preferred.
• Deep expertise with Slurm Workload Manager, including configuration, troubleshooting, and performance tuning.
• Demonstrated experience administering Linux virtual desktops or thin-client environments.
• Experience managing environment modules, compiler toolchains, and MPI runtimes, including OpenMPI, Intel MPI, or similar technologies.
• Experience with HPC networking concepts, including latency optimization, MPI tuning, and high-performance interconnects.
• Proficiency with system monitoring and observability tools.

Technical Skills — Nice to Have

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