Mechanical Engineer

The Nuclear Company is the fastest growing AI tech-enabled startup in the nuclear and energy space, pioneering a fleet-scale approach to building the next generation of nuclear reactors. Through our design-once, build-many model, we're accelerating the deployment of safe, reliable, and affordable nuclear energy.

We operate with an AI-first mindset. Every employee is expected to leverage AI, technology, and the Nuclear Operating System (NOS) as integral components of their role to improve the quality, speed, and impact of their work. We expect every team member to continuously identify opportunities to automate workflows, enhance decision-making, improve processes, and contribute to the ongoing evolution of NOS as a strategic operating capability that enables The Nuclear Company to scale with excellence.

We hire people who are driven by purpose, thrive in ambiguity, and are energized by building what has never been built before. Our team combines intellectual curiosity with high agency, embraces candid feedback and continuous learning, and holds themselves and others to exceptional standards. Our values—Transparency, Responsibility, Unity, Scrappy, and Tenacity—guide how we hire, collaborate, and make decisions every day. They are not words on a wall; they are the standard by which we operate. TRUST is the foundation of our safety culture, fostering intellectual honesty, accountability, and open communication, while our values challenge every team member to execute with urgency, humility, resilience, and an unwavering commitment to our mission.

About the role

The Staff Mechanical Engineer will be a technical lead responsible for designing, analyzing, and maintaining complex mechanical systems and components for nuclear power plants (operating or a new build) or advanced reactor projects. They will work with a multi-discipline team of engineers in the design, analysis, and evaluation of systems and components using engineering software, including support to lead engineers. They apply advanced engineering principles and engineering codes & standards, such as AMSE and ANSI, to develop solutions that meet strict safety, regulatory, and quality standards. They will resolve technical issues for operating nuclear power plants, new plants, and other nuclear and non-nuclear projects. This role supports Corporate initiatives as well as ongoing construction projects. 

Responsibilities

• Design and analysis of mechanical components and systems.
• Prepare engineering calculations, drawings and specifications.
• Prepare or review engineering modification packages.
• Provide technical guidance to junior engineering staff.
• Diagnose mechanical equipment failures, support root cause analyses, and implement corrective actions.