Senior Nuclear Systems Engineer

The Senior Nuclear Systems Engineer supports the development of a next‑generation nuclear power plant as part of a multidisciplinary engineering team responsible for Nuclear Island (NI) systems‑level design. This role is intended for experienced engineers who can act as a technical authority for assigned NI systems, independently leading system‑level design, integration, and licensing activities while mentoring junior engineers in a highly regulated environment. Supporting the SMR‑300, this position works closely with engineering, manufacturing, and licensing teams as part of a U.S. Government cost‑shared development program, developing system requirements, specifications, analyses, and design documentation to support safe, compliant, and executable plant designs.

Location: Camden, NJ or North Pittsburgh, PA (Relocation assistance available!)

Primary Responsibilities:

• Lead multi‑disciplinary system engineering and integration activities across major SMR‑300 plant systems, ensuring technical consistency and alignment across engineering disciplines
• Develop and manage system requirements, interface definitions, and component specifications to support detailed design, analysis, and licensing activities
• Serve as a technical mentor to early‑career and mid‑level systems engineers, providing design guidance and reviewing calculations, specifications, and technical deliverables
• Perform and oversee engineering analyses and calculations, particularly in areas related to thermal‑fluids and overall plant system performance
• Conduct and support technical trade studies and design evaluations that inform high‑impact decisions affecting plant architecture, safety, and performance
• Coordinate closely with licensing, safety, and regulatory teams to ensure system designs support safety case development and meet applicable codes and regulatory expectations
• Collaborate with internal engineering teams, suppliers, and manufacturing partners to ensure system designs are technically sound, manufacturable, and executable
• Support technical reviews, design documentation development, and internal design approval processes in alignment with program milestones and quality standards
• Serve as a technical lead for assigned Nuclear Island systems, owning system integration, requirements, and cross‑discipline alignment.
• Execute assigned system‑level engineering scope for the SMR‑300 development program, delivering work with a high standard of quality, safety, and regulatory rigor

Requirements:

• Bachelor’s degree in Engineering (Mechanical, Nuclear, Electrical, or related discipline); Master’s degree preferred
• 8+ years of progressive engineering experience, with demonstrated growth in technical responsibility and scope
• Prior experience serving as a system owner or lead engineer for safety‑related Nuclear Island (NI) systems on an operating or new‑build nuclear power plant strongly preferred
• Demonstrated experience mentoring and technically developing junior engineers, including review of designs, calculations, and system‑level deliverables
• Proven ability to lead multidisciplinary engineering teams, resolve highly complex technical issues, and drive system‑level decisions
• Strong fundamentals in heat transfer and fluid dynamics, with demonstrated application to complex plant systems
• Experience developing engineering designs, specifications, drawings, and technical requirements in collaboration with engineers, suppliers, and manufacturers
• Experience working in the nuclear energy industry in a system design or systems engineering capacity preferred; candidates with aerospace, defense, or other regulated‑industry systems experience also encouraged
• Familiarity with engineering and design tools such as SmartPlant, Mathcad, AutoCAD, Pipe Flo, HTRI, Engineering Lifecycle Management (ELM), and requirements management tools (e.g., DOORS NG) preferred
• Excellent technical writing, communication, and stakeholder engagement skills
• Proficiency in Microsoft Office applications, particularly Word and Excel
• EIT and/or PE certification preferred

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 $140,000 to $165,000

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™.