CAD Designer II (2D/3D-Nuclear) Anyone

We’re pioneering the next generation of nuclear technology to deliver safe, scalable, and sustainable energy. Our team is small, fast-moving, and mission-driven —combining deep technical expertise with a startup’s sense of urgency. As we grow, we’re designing systems that will redefine what nuclear power can do for the world.

Fissionaire is building the next generation of nuclear technologies, and this role sits at the heart of turning engineering intent into precise, build-ready designs. You’ll own the CAD workflow, support multidisciplinary engineering teams, and ensure every drawing stands up to nuclear-grade expectations. If you thrive in high-accountability environments and want your work to directly shape future nuclear systems, this is where you’ll make an impact.

Key responsibilities
-Develop detailed 2D and 3D CAD models for nuclear system components, mechanical assemblies, piping, shielding, and structural elements.
-Translate engineering requirements, calculations, and specifications into manufacturable, quality-controlled drawings.
-Maintain configuration control, drawing standards, revision logs, and documentation in accordance with nuclear QA frameworks (e.g., ASME NQA-1, ANSI/ANS standards).
-Support design reviews by preparing accurate models, exploded views, interface checks, and tolerance analyses.
-Collaborate closely with mechanical, nuclear, thermal-hydraulic, and systems engineers to refine concepts, resolve design issues, and ensure alignment across disciplines.
-Conduct CAD-based simulations, clash detection, and fit-up validation using industry tools.
Assist in vendor interface by providing clear fabrication packages, answering technical queries, and updating drawings as needed.
-Contribute to continuous improvement of CAD workflows, libraries, and design standards.

Qualifications
-Associate’s or Bachelor’s degree in Drafting, Mechanical ---Design, Engineering Technology, or related field or 5+ years experience as a drafter/modeler.
-Professional experience in CAD design for nuclear, energy, aerospace, or similarly regulated industries.
-Strong proficiency with modern CAD tools (e.g., SolidWorks, Inventor, Creo, AutoCAD, or similar).
-Solid understanding of GD&T, mechanical tolerances, fabrication methods, and material properties.
-Experience applying nuclear-industry standards (ASME, ASTM, RCC-MRx, etc.).
-Ability to read, interpret, and develop engineering drawings, P&IDs, and system schematics.
-Detail-driven mindset with a disciplined approach to documentation and version control.
-U.S. citizenship or permanent residency required.

Preferred Qualifications:
-Experience in reactor design, radiation shielding, balance-of-plant systems, or nuclear fuel cycle equipment.
-Familiarity with PLM/PDM systems (Windchill, Teamcenter, etc.).
-Background in piping design, pressure vessel design, or seismic qualification.
-Exposure to manufacturing processes, suppliers, and tolerancing best practices in regulated environments. read less