Job Description

About Subcritical Systems Inc.

Subcritical Systems Inc. is a venture-backed startup based in Austin, Texas dedicated to bringing the energy amplifier concept to the United States for safe generation of electrical power. Using a particle accelerator to sustain fission of nuclear fuel in a subcritical core, our innovative approach aims to transform energy production. The founding team is comprised of successful entrepreneurs with a history of building cutting-edge technology companies and scientists from US national labs with deep experience in energy amplifier technologies. Subcritical Systems is actively hiring to expand its dynamic team, working towards licensing, regulatory submissions and construction of its first energy amplifier. More information is available at subcritical.com.

About the Role

We are seeking a creative CAD Designer to join our growing team in a full-time, on-site role located in Austin, TX. In this role you will work closely with our engineering and scientific teams to develop designs for subcritical assembly and particle accelerator components and systems. Your work will deeply influence the design and realization of the world's first accelerator-driven system for power generation.

This is an ideal role for an ambitious, creative, and hard-working Designer who wants to apply their expertise to a first-of-its-kind nuclear power system and, in doing so, help transform the global energy landscape.

Key Responsibilities

CAD Modeling & Design

• Work closely with engineers and scientists to design Energy Amplifier components and systems.
• Create and maintain 3D CAD models, assemblies, layouts, schematics, and technical drawings.
• Generate complete drawing packages, BOMs, and documentation to support fabrication and assembly.
• Apply GD&T, DFM, and DFA practices to ensure drawings are clear, manufacturable, and accurate.

Engineering Collaboration

• Support engineers in preparing mechanical assembly packages.
• Work closely with engineers to incorporate design intent into manufacturable drawings.
• Translate engineering requirements into detailed drawing packages.

Vendor & Supplier Interface

• Interface with suppliers, vendors, and fabrication shops to communicate drawing requirements and resolve build issues.
• Apply familiarity with machining and metalworking to ensure designs are practical and cost-effective to produce.

Who You Are

• Associate of Science degree in Mechanical Design, Drafting, or related field with 2+ years of experience supporting mechanical engineering projects.
• Proficiency with NX, SolidWorks, Solid Edge, Pro-E, or similar 3D CAD tools (NX preferred).
• Ability to create, revise, and check mechanical drawings using GD&T per ASME Y14.5.
• Experience applying design-for-manufacturing (DFM) and design-for-assembly (DFA) principles to support engineering intent.
• Familiarity with machining and metalworking processes.
• Experience working in a team environment with engineers, technicians, and vendors.
• Strong work ethic, resilient, and comfortable working in a fast-paced, collaborative startup environment.

Pluses

• 1+ years of experience in mechanical design for high-tech applications.
• Extensive familiarity with fabrication processes including machining, welding, and forming.
• Familiarity with revision control, configuration management, and drawing release workflows.
• Ability to create CAD libraries of standard parts, hardware, and templates to improve team efficiency.
• Hands-on experience assembling mechanical prototypes, fixtures, or test jigs.

Important Notes

• This role is fully in person in Austin, Texas. Our facility is located next to Austin Airport.
• Compensation: Competitive Base Salary + Equity + Bonus + Comprehensive Healthcare.
• A high-impact role where your work has real-world application in addressing the nation's energy challenges through truly forward-looking technology.
• The chance to work alongside world-class entrepreneurs and well-known scientific leaders on a first-of-its-kind nuclear power system.

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