PSA Engineer III

Holtec International; Camden (NJ); Hybrid; USD 150,000 - 175,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

Hybrid work opportunities

401(k) with company match

Paid time off and holidays

Wellness program

Commuter benefits

Life and AD&D insurance

Education assistance

Employee assistance program

Flexible benefits

Job summary

Holtec International is seeking an experienced PSA engineer to lead the development of PSA models and thermal‑hydraulic analyses for risk‑informed design and licensing. You will build Level 1 and Level 2 PRA models for various scenarios, and perform RELAP5‑3D/MELCOR simulations to assess core and containment responses.

You will also create event/fault trees to evaluate metrics like CDF and LRF, maintain models as designs evolve, and support regulatory interactions and design decisions across

Qualifications

• 6–10 years of experience in PSA and/or thermal‑hydraulic safety analysis in nuclear industry.
• Strong understanding of light water reactor (LWR) thermal‑hydraulic behavior.
• Familiar with PSA regulatory frameworks and ASME/ANS PRA standards.
• Experience with external hazards (fire, flood, seismic) or low power/shutdown analysis preferred.
• Knowledge of PSA modeling tools and reporting/documentation standards.

Responsibilities

• Lead development of PSA models and supporting thermal‑hydraulic analyses for risk‑informed design and licensing.
• Develop Level 1 and Level 2 PRA models for internal and external events across full power and shutdown.
• Perform thermal‑hydraulic modeling (RELAP5‑3D, MELCOR) to simulate core and containment response.
• Develop and quantify event trees and fault trees to evaluate CDF and LRF.
• Maintain PSA models as SMR‑300 design evolves and support licensing activities.

Skills

PSA modeling

Thermal-hydraulic safety analysis

Relap5-3D

MELCOR

CAFTA

SAPHIRE

RiskSpectrum

Technical writing

Cross-functional collaboration

Education

Bachelor’s degree in Nuclear Engineering

Bachelor’s degree in Mechanical Engineering

Tools

CAFTA

SAPHIRE

RiskSpectrum

RELAP5-3D

MELCOR

Job description

Location

Camden, NJ Waterfront Campus with other locations available!

• This position may be based at one of several Holtec locations across the United States. Relocation assistance available!

Primary Responsibilities

• Lead development of PSA models and supporting thermal‑hydraulic analyses for risk‑informed design and licensing
• Develop Level 1 and Level 2 PRA models for internal and external events across full power and shutdown conditions
• Perform thermal‑hydraulic modeling (RELAP5‑3D, MELCOR) to simulate core and containment response in severe accident scenarios
• Develop and quantify event trees and fault trees to evaluate key risk metrics such as core damage frequency (CDF) and large release frequency (LRF)
• Maintain and update PSA models as SMR‑300 design evolves
• Apply PSA results to support risk‑informed programs (e.g., RTNSS, D‑RAP, 10 CFR 50.69 categorization)
• Partner with design engineers to integrate PSA insights into system and plant design decisions
• Mentor junior engineers on PSA methodologies, tools, and best practices
• Ensure technical accuracy, quality, and consistency across all PSA deliverables
• Support regulatory interactions and documentation related to safety analysis and licensing

Requirements

• Bachelor’s degree in Nuclear Engineering, Mechanical Engineering, or a related field
• 6–10 years of experience in PSA and/or thermal‑hydraulic safety analysis within the nuclear industry
• Strong understanding of light water reactor (LWR) thermal‑hydraulic behavior
• Expertise with PSA and modeling tools (e.g., CAFTA, SAPHIRE, RiskSpectrum, RELAP5‑3D, MELCOR)
• Experience with PSA specialty areas such as external hazards (fire, flood, seismic) or low power/shutdown analysis preferred
• Knowledge of PSA regulatory frameworks and ASME/ANS PRA standards
• Strong analytical, technical writing, and communication skills
• Ability to work cross‑functionally in a complex engineering environment
• Eligible to work under 10 CFR Part 810

A Generation Ahead by Design

Investing in people who power the future.

Compensation

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:

• Annual compensation based on skills and experience ranging from $150,000 to $175,000

Benefits

• Industry‑leading medical, dental, and vision coverage with a generous employer premium contribution and Day1 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.