Company Description
Subcritical Systems Inc. is a funded 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 venture-backed and 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 Mechanical Design Engineer to join our growing team in a full-time, on-site role located in Austin, TX. In this role you will work closely with the 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 use their expertise to transform the energy system and in so doing change the world.
Responsibilities:
- Develop conceptual and detailed mechanical designs for components, assemblies, and systems.
- Translate functional requirements, specifications, and performance targets into manufacturable designs.
- Create and manage 3D CAD models and 2D fabrication drawings using software such as NX or SolidWorks (NX preferred).
- Generate assembly models, weldment drawings, and detailed part documentation.
- Conduct engineering calculations and simulations (e.g., stress, thermal, vibration, fatigue, or CFD).
- Use analytical tools or finite-element packages to validate design integrity.
- Select appropriate materials, coatings, and surface treatments for performance and corrosion resistance.
- Develop fabrication and assembly specifications, bill of materials and procurement packages.
- Prepare engineering documentation, including design reports, calculations, and interface control documents.
- Ensure compliance with applicable codes, standards, and safety requirements.
- Apply GD&T, DFM, and DFA practices to ensure drawings are clear, manufacturable, and accurate
- Interface with suppliers, vendors, and fabrication shops to communicate drawing requirements and resolve build issues
About You:
- Bachelor’s degree in Mechanical Engineering with 2+ years of experience supporting mechanical engineering projects
- Proficiency with NX, SolidWorks, Solid Edge, Pro-E, or similar 3D CAD tools (NX preferred)
- Proficiency in Finite Element Analysis
- Ability to create, revise, and check mechanical drawings using GD&T per ASME Y14.5
- Familiarity with machining, metalworking, welding
- Experience applying design-for-manufacturing (DFM) and design-for-assembly (DFA) principles to support engineering intent
- Ability to translate engineering requirements into detailed drawing packages
- Experience working in a team environment with scientists, engineers, technicians, and vendors
- Strong work ethic, resilient, able to work in a fast-paced collaborative environment
Pluses:
- Extensive familiarity with NX
- Extensive familiarity with fabrication processes (machining, welding, forming)
- Familiarity with revision control, configuration management, and drawing release workflows
- Hands-on experience assembling mechanical prototypes, fixtures, or test jigs
What We Offer:
- A high-impact role where your work has real-world application in addressing the nation’s energy challenges via the development of truly forward-looking approaches and technology.
- Competitive compensation commensurate with experience and technical expertise.
- Comprehensive healthcare insurance.
- The chance to work alongside world-class entrepreneurs and well-known scientific leaders.
- An opportunity to work in a fast-paced startup environment.
- The opportunity to live in the thriving, dynamic community of Austin, Texas, with all the city has to offer.
