Test Engineer III

Holtec International is seeking a Thermal-Hydraulics Test Engineer III to support the validation of thermal-hydraulic performance for safety-related and non-safety-related systems as part of the SMR-300 design certification and commercialization effort. This role is integral to ensuring that thermal-hydraulic test programs are technically rigorous, properly documented, aligned with design and licensing objectives, and executed in accordance with applicable quality and safety requirements.

The Thermal-Hydraulics Test Engineer III will serve as a recognized technical contributor within the testing organization and will be responsible for leading major portions of complex test programs, functional areas across multiple programs, or simpler test programs in their entirety. This position requires strong technical judgment, the ability to work independently on complex assignments, and the ability to integrate inputs from design engineering, analysis, licensing, quality assurance, vendors, and test sponsors.

The successful candidate will develop test requirements, plans, procedures, specifications, data analysis methods, and technical reports that support design validation, model development, regulatory engagement, and commercialization of Holtec’s SMR technology. The role also includes mentoring junior engineers, improving test methods and tools, and helping establish robust practices for thermal-hydraulic test planning, execution, documentation, and data quality.

Location: Camden, NJ with occassional travel to Idaho Falls up to 25%.

Requirements:

• B.S. in Mechanical Engineering, Nuclear Engineering, Chemical Engineering, or closely related discipline.
• 6 to 10 years of relevant engineering experience, preferably in laboratory testing, thermal-hydraulics, nuclear systems, fluid systems, heat transfer, or test engineering environments.
• Demonstrated experience planning, executing, and documenting engineering test programs.
• Experience interpreting engineering drawings, P&IDs, system descriptions, design specifications, and analysis requirements.
• Experience translating design, analysis, or licensing needs into test requirements, test plans, procedures, specifications, and acceptance criteria.
• Experience with thermal-hydraulic instrumentation, data acquisition systems, calibration practices, and data quality controls.
• Experience performing data reduction, analysis, uncertainty evaluation, visualization, and interpretation of engineering test data.
• Experience working in a QA-controlled, safety-related, or highly regulated engineering environment.
• Ability to independently resolve complex technical issues and provide timely, well-supported engineering recommendations.
• Experience with instrumentation selection for pressure, temperature, flow, level, differential pressure, heat flux, void fraction, or two-phase flow measurements.
• Experience applying relevant industry codes and standards to engineering design, test facility setup, instrumentation, equipment selection, or test execution.
• Ability to support on-site testing, extended test campaigns, commissioning activities, troubleshooting, and occasional travel.
• Strong technical writing, interpersonal, and communication skills.
• Ability to present technical results, test status, and engineering conclusions to internal stakeholders, external partners, clients, or regulators.

Preferred Qualifications:

• M.S. or Ph.D. in Mechanical Engineering, Nuclear Engineering, Chemical Engineering, or closely related discipline.
• Experience with nuclear thermal-hydraulic testing, separate-effects testing, integral-effects testing, component testing, or system-level validation testing.
• Experience with test loop or facility design, setup, commissioning, operation, troubleshooting, and maintenance.
• Familiarity with scaling analysis, similarity criteria, thermal-hydraulic phenomena identification, and test matrix development.
• Proficiency with Python, MATLAB, LabVIEW, or similar tools for data acquisition, reduction, automation, analysis, and visualization.
• Experience applying standards such as ASME B31.1/B31.3, ASME BPVC, ASME PTC, IEEE, ISA, or related industry standards in a test, laboratory, nuclear, or regulated engineering environment.
• Familiarity with NQA-1 quality assurance requirements and U.S. NRC licensing processes.
• Experience preparing design verification documentation, validation reports, test readiness reviews, and licensing-supporting technical documentation.
• Experience interfacing directly with internal or external test sponsors, vendors, laboratories, or regulatory stakeholders.
• Experience leading small engineering teams within larger test programs.
• Experience mentoring junior engineers or developing technical training materials.

A Generation Ahead by Design™
Investing in people who power the future.

We believe great work deserves great rewards. Our benefits go beyond the basics, reflecting our commitment to supporting your whole self…your health, your future, and your career growth. This includes:

Compensation:

• Annual compensation based on skills and experience ranging from $120,000.00-$140,000.00

Benefits:

• Industry‑leading medical, dental, and vision coverage with a generous employer premium contribution and Day 1 eligibility!
• FLEX Program – Hybrid work opportunities available for eligible roles, where business needs and role requirements allow
• 401(k) retirement plan with up to a 5% company match and immediate vesting to support long‑term financial security
• Paid time off and 11 paid holidays to support rest, balance, and recharge
• Wellness program offering rewards for participation in company‑supported health initiatives
• Commuter benefits supporting mass transit and commuter parking options
• Company‑paid life and AD&D insurance for added peace of mind
• Education assistance to support continued education and professional growth
• Employee support and voluntary benefits, including an Employee Assistance Program and optional coverage such as disability, legal, identity theft, and insurance programs
• Benefits eligibility and offerings may vary based on role, location, and employment status 

If you’re driven to solve meaningful challenges and make a lasting impact, we invite you to build your career at Holtec—a generation ahead by design™.