Simulator Engineer – Training & Simulation Engineering

TerraPower LLC.; Kemmerer (WY); On-site; USD 141,385 - 212,079; Full time

Benefits offered by this job

Relocation assistance

Competitive compensation

PTO 21 days

Medical and wellness benefits

Job summary

TerraPower LLC. is seeking a Simulator Engineer for Training & Simulation Engineering to design, develop, and sustain a FOAK fast sodium reactor training simulator.

You will work across FORTRAN, C++, Python to reflect plant dynamics and control logic in real-time platforms. You will collaborate with reactor design, I&C, and training staff to ensure high fidelity across normal operations, transients, and training scenarios, while complying with QA and standards.

Qualifications

• Bachelor’s degree in a technical discipline or equivalent work experience.
• Minimum 3–5 years of experience in training simulator engineering or real-time simulation.
• Proficiency in FORTRAN, C++, and Python.
• Experience with real-time simulation platforms (R*Time and RTP).
• Familiarity with configuration management/version control environments such as 3 Key Master.

Responsibilities

• Develop, maintain, and enhance dynamic models of reactor systems using FORTRAN, C++, and Python.
• Configure, maintain, and troubleshoot real-time simulation platforms (R*Time and RTP).
• Use 3 Key Master tools for model version control, configuration management, and benchmarking.
• Collaborate with engineers and training specialists to ensure simulator fidelity across normal and abnormal conditions.
• Participate in simulator upgrades, rehosting, and new visualization efforts.
• Perform acceptance testing, validation, and model verification against plant calculations and training needs.
• Support training sessions by diagnosing issues and minimizing downtime.
• Produce engineering docs, model descriptions, and test records per QA standards.

Skills

FORTRAN

C++

Python

Real-time simulation concepts

Analytical skills

Education

Bachelor's degree in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, Computer Science, or related technical discipline

Tools

3 Key Master

R*Time

RTP

Job description

TerraPower is a nuclear technology company based in Bellevue, Washington. At its core, the company is working to raise living standards globally through a more affordable, secure, and environmentally friendly form of nuclear energy along with innovations in medical isotopes to improve human health. In 2006, TerraPower originated with Bill Gates and a group of like-minded visionaries who evaluated the fundamental challenges to raising living standards around the world. They recognized energy access was crucial to the health and economic well-being of communities and decided that the private sector needed to take action and create energy sources that would advance global energy deployment. TerraPower’s mission is to be a world leader in new nuclear technologies, while developing innovators and future leaders in the nuclear field. As a result, the company’s activities in the fields of nuclear energy and related sciences are yielding significant innovations in the safety and economics of nuclear power, hybrid energy and medical applications – all for significant human health benefits.

TerraPower is seeking to hire highly motivated and forward-thinking professionals who are interested in focusing on advanced nuclear reactor research and development and influencing change within the nuclear power landscape and bringing forward the critical production of medical isotopes. TerraPower is an Equal Opportunity Employer. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by federal, state, or local law.

Simulator Engineer – Training & Simulation Engineering

The Simulator Engineer will play a critical role in the design, development, integration, and sustainment of a first-of-a-kind (FOAK) fast sodium reactor (FSR) training simulator within our training organization. This role ensures that the simulator accurately reflects plant dynamics, control logic, and thermophysical behavior unique to fast sodium reactor technology.

You will work with multiple programming languages (FORTRAN, C++, Python) and real-time simulation platforms (3 Key Master, R*Time, RTP) to support operator training, engineering support, and scenario development.

Responsibilities

• Develop, maintain, and enhance dynamic models of reactor systems, including primary sodium coolant loops, intermediate circuits, decay heat removal systems, and associated instrumentation & control (I& C) logic using FORTRAN, C++, and Python.
• Configure, maintain, and troubleshoot real-time simulation platforms (R*Time and RTP), and support integration with control room hardware, digital I& C, and interface systems.
• Employ 33 Key Master tools for model version control, configuration management, performance benchmarking, and change tracking.
• Collaborate with reactor design engineers, I& C engineers, training specialists, and human factors experts to ensure simulator fidelity across normal operations, transients, and off-normal conditions.
• Participate in simulator upgrade or replacement projects, including rehosting, model enhancements, digital I& C adaptation, and improved visualization.
• Perform acceptance testing, validation, debugging, and model verification to ensure simulator behavior aligns with plant calculations, design basis events, and training needs.
• Support training sessions by diagnosing simulator issues, implementing corrective model actions, and minimizing downtime during training.
• Produce and maintain detailed engineering documentation, model descriptions, test records, and change logs in compliance with nuclear quality assurance (QA) standards and configuration control processes.
• Align simulator development with applicable standards such as ANSI/ANS-3.5, NRC licensing requirements (10 CFR 55), and INPO accreditation.

Required Skills

• Bachelor’s degree in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, Computer Science, or related technical discipline OR relevant work experience.
• Minimum 3–5 years of experience in training simulator engineering, real-time simulation, or plant system modeling—preferably in a nuclear or heavily regulated environment.
• Proficiency in FORTRAN, C++, and Python programming languages.
• Experience working with real-time simulation platforms (R*Time and/or RTP).
• Familiarity with 3 Key Master or equivalent configuration management/version control environments.
• Strong analytical, debugging, and problem-solving skills.
• Excellent communication and documentation skills.

Preferred Skills

• Direct experience supporting nuclear simulator development for advanced reactor technologies (fast reactors, sodium-cooled systems) or first-of-a-kind plants.
• Understanding of fast reactor physics, liquid-metal thermal/hydraulics, sodium coolant system behavior, or similar advanced reactor technologies.
• Knowledge of ANSI/ANS-3.5 simulator standards, NRC licensing processes (10 CFR 50/52), INPO simulator accreditation, or nuclear QA (NQA-1).
• Experience in the training organization of a nuclear power plant or working with digital I& C integration, human-system interface (HSI) validation, or plant commissioning.
• Eligibility for U.S. government export-controlled work (e.g., U.S. Citizen, U.S. National, Permanent Resident) due to TerraPower’s controlled technology status.

Key Competencies

• High technical aptitude and adaptability, especially in emerging nuclear technologies.
• Demonstrated commitment to safety, quality, and regulatory compliance.
• Strong collaboration skills—able to work effectively with instructors, engineers, designers, and training staff.
• Ability to manage multiple tasks and priorities under tight timelines in a fast-paced environment.
• Self-driven learner with strong initiative for technical improvement and innovation.
• Clear and effective verbal and written communication, capable of articulating complex technical topics to diverse audiences.

Additional Information

• Travel Requirements: Occasional travel to plant design, training facilities, or vendor sites may be required.
• Technology Access: This role may involve export-controlled or regulated technologies. Applicants may need to provide citizenship or immigration status.
• Benefits: TerraPower offers a comprehensive total-rewards package, including a competitive salary, medical/wellness benefits, PTO, and professional development opportunities.
• Relocation Assistance: Relocation assistance may be available.

Job details

Job Type: Full-time

Salary Range: $141,385 – $212,079

Any salary offered within the posted salary band is based on market data and commensurate with the selected individual’s qualifications and experience. This range is specific to Wyoming State.

• Competitive Compensation
• Salary, eligible to participate in discretionary short-term incentive payments
• Comprehensive Medical and Wellness Benefits
  • Medical
  • Vision
  • Dental
  • Life and Disability
  • Gender Affiliation Benefits
• 401k Plan
• Generous Paid Time Off (PTO)
  • 21 days of annually accrued PTO
• Generous Holiday Schedule
  • 10 paid holidays
• Relocation Assistance
• Professional and Educational Support Opportunities

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