Simulation Engineer; GSE Software

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Corvallis, OR (Onsite) or Remote

$110,000 – $130,000 + Full Benefits Package

U.S. Citizenship Required (Local or regional candidates preferred)

Johnson Service Group (JSG) is recruiting for an experienced Simulation Engineer to join a cutting‑edge nuclear operations team.

This direct‑hire role focuses on developing and maintaining simulation models that power the control room simulator—a critical tool for plant operations and operator training.

If you have hands‑on experience with GSE Simulation Software, this is the opportunity to apply your expertise to one of the most advanced nuclear energy projects in the U.S.

To be considered, candidates must have direct experience with GSE Simulation Software, such as Sim Exec, JTopmeret, or JElectric. This experience is required and essential to success in the role.

• Develop and update plant simulation models using GSE Simulation Software tools.
• Accurately reflect engineering documentation into simulator models.
• Support the development, testing, and operation of the control room simulator.
• Identify and troubleshoot defects, ensuring simulator performance and reliability.
• Collaborate with nuclear operators and engineers to improve model fidelity.
• Perform limited hardware setup and maintenance (computers, monitors, cables).

• Bachelor’s degree in Computer Science, Physics, Engineering, or related field.
• 5+ years of software development experience.
• 3+ years of simulation or modeling development experience.
• Required:
  
  Proficiency in GSE Simulation Software (Sim Exec, JTopmeret, or JElectric).
• Strong programming skills in Fortran, C++, and/or Python.
• Experience with configuration tools such as Git, Git Lab, or Git Hub.
• Familiarity with thermal‑hydraulic and neutronic analysis codes (RELAP5, TRACE, Simulate3, MCNP) preferred.
• Understanding of P&IDs and thermal‑hydraulic principles is a plus.
• Must be eligible under DOE 10 CFR Part 810.

• Work on one of the most advanced nuclear simulator systems in the U.S.
• Play a hands‑on role in clean energy innovation and operator training excellence.
• Collaborate with a passionate, high‑caliber team driving the next generation of reactor development.
• Enjoy competitive pay, a full suite of benefits, and long‑term career growth through JSG’s nationwide network.

• Dental
• Vision
• Life Insurance
• Short‑Term Disability
• 401(k)
• Weekly Pay
• Career Development

Johnson Service Group (JSG) is a nationally recognized professional staffing firm and a proud Equal Opportunity Employer. We celebrate diversity and are committed to building inclusive, innovative teams that reflect the communities we serve.

Mid‑Senior level

Full‑time

Information Technology

Staffing and Recruiting