HPC Support Engineer - TS​/SCI

HPC Support Engineer – Charlottesville, VA (100% Onsite) – Active TS/SCI Clearance Required

Full-time Description

About The Role

Phoenix is seeking an HPC Support Engineer to support users executing computational workloads within advanced Linux-based High Performance Computing (HPC) environments. This role is essential to ensuring efficient, reliable execution of distributed workloads, scientific simulations, and GPU-accelerated processing.

You will work directly with users and systems in a cluster-scale environment
, helping optimize job performance, troubleshoot issues, and promote HPC best practices.

• Support execution of distributed compute workloads on HPC clusters
• Troubleshoot job failures and performance issues
• Assist users with scheduler job submission scripts (e.g., Slurm, PBS)
• Identify and resolve performance bottlenecks across compute workloads
• Support GPU-enabled workloads and CUDA-based processing
• Guide users on efficient cluster utilization and HPC best practices
• Assist with application execution, compilation, and runtime issues
• Develop and maintain automation scripts and tooling

• Active TS/SCI clearance
• Ability to work onsite in Charlottesville, VA
• 5+ years of experience in Linux environments supporting HPC or distributed compute workloads
• Experience executing or troubleshooting workloads using:
  • Slurm
  • PBS / PBS Pro
  • Torque or similar schedulers
• Strong command-line Linux experience (RHEL preferred)
• Experience with scripting or automation (Bash, Python, or similar)
• Ability to obtain DoD 8140 (8570) IAT Level II certification

• Experience supporting HPC cluster environments
• Experience with MPI, OpenMP, or parallel computing frameworks
• Experience supporting GPU workloads and CUDA environments
• Familiarity with scientific or engineering applications in HPC environments
• Experience with C/C++ or Fortran and compiler tool chains (GCC, Intel, LLVM)
• Experience troubleshooting application build or runtime issues
• Experience supporting research labs, university HPC, or defense environments

You’ll Work In a Cutting-edge Environment That Includes

• Multi-node Linux HPC clusters
• Workload schedulers (Slurm, PBS)
• Distributed computing frameworks (MPI, OpenMP)
• GPU-enabled compute (CUDA)
• High-performance networking (RDMA, Infini Band)

• HPC workload support or user-facing engineering roles
• Research computing or university HPC centers
• National labs or scientific computing environments
• Defense or intelligence community computing programs

• HPC workload execution or troubleshooting experience
• Scheduler expertise (Slurm, PBS, etc.)
• Linux-based compute environment experience
• Distributed workload performance tuning
• Automation and scripting experience

• Medical, Dental, Vision Insurance – 100% Company Paid Premiums
• STD, LTD, and Life Insurance – 100% Company paid
• 401K – Automatic 10% company contribution; no matching required
• PTO – 4 weeks/year
• Holidays – 11 paid/year
• Birthdays off with pay
• Referral Bonuses – Upfront AND Annually Recurring
• Open Source Bonuses – Contribute to our Github projects
• Professional Development – Paid training, Certifications, and Enrichment

Phoenix Operations Group is a high-end engineering services company dedicated to protecting and advancing our national cyber resources. As a small company, we rely on innovation to continually advance our employees' skills and provide game-changing solutions to our customers.

Our technical competencies include Big Data analytics (batch and streaming), Cloud Computing infrastructure, multi-INT visualization, and enterprise architectures. We support operational missions (All-Source, Financial, CND) and serve as Product Owners for our open-source research initiatives.

Please visit us at  for more information.

Phoenix Operations Group is an Equal Opportunity Employer. Phoenix Operations Group does not discriminate based on race, religion, color, sex, gender, gender identity, sexual orientation, age, non‑disqualifying physical or mental disability, national origin, veteran status, or any other basis covered by appropriate law. All employment is decided based on qualifications, merit, and business needs.