About Us NPX partners with nuclear utilities and new reactor projects to unlock performance through innovation. We combine decades of nuclear operation expertise with AI, digital tools, and lean processes, to help plants run safer, smarter, and more cost-effectively.

The Role The Senior Mechanical Design Engineer is responsible for delivering high-quality mechanical design solutions for nuclear facilities. In this role, you will lead complex design scopes, provide technical direction and oversight, and serve as a trusted engineering partner to clients.

You will apply mechanical design engineering expertise to guide projects from concept through detailed design, while mentoring junior engineers, driving continuous improvement in design processes, and championing innovation in how nuclear design engineering work is executed.

Travel Requirements: Flexible based on project needs.

What You’ll Drive

• Provide technical leadership and engineering judgment, including defining design approaches, resolving complex technical issues, and ensuring alignment with safety, regulatory, and project requirements.
• Prepare, review, and approve mechanical engineering deliverables in accordance with applicable procedures, codes, standards, and regulatory requirements.
• Act as a technical interface with clients, vendors, regulators, and internal stakeholders, supporting design reviews, technical meetings, and issue resolution.
• Collaborate across disciplines to define and achieve the required functionality, performance, reliability, availability, and maintainability of systems and components.

What You Bring

• Results & Impact: you deliver measurable outcomes and business value.
• Leadership & Influence: you elevate team performance and create influence without being asked.
• Adaptability & Growth: you thrive in dynamic environments and embody a growth mindset.
• Initiative & Innovation: you proactively identify and solve problems.
• Cultural Amplification: you strengthen our culture and role model our values.

🌿 What You’ll Find Here To do great work, you need to be well in mind, body, and soul. At NPX, we design our environment around the whole person , not just the job they do.

• 🧠 Mind: Tools and support for mental wellness, professional growth, and financial security.
• 🧘‍♀️ Body: Health coverage, a spending account, and the freedom to rest and recharge.
• 🌀 Soul: Meaningful work, alignment with your values, and time to refresh with flexible time off.
• 💰👀 Financial wellbeing? Covered. That means competitive pay and recognition for the impact you make.