Subcritical Systems Inc
Nuclear Engineer - Subcritical Core Analyst
Subcritical Systems Inc, Austin, Texas, us, 78716
Nuclear Engineer - Subcritical Core Analyst
We are seeking a Nuclear Engineer to lead the neutronics design of a subcritical core for an Energy Amplifier.
About Subcritical Systems Inc.
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 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, work towards licensing, regulatory submissions and construction of its first energy amplifier.
About the Role
We are seeking a creative and dynamic Nuclear Engineer to join our growing team in a full‑time, on‑site role located in Austin, TX. In this role you will lead the neutronics design of the subcritical core. This is an ideal role for an ambitious, creative and hard‑working engineer who wants to use their expertise to transform the energy system and in so doing change the world.
Responsibilities:
Serve as an integral member of the subcritical core team responsible for designing, prototyping, and ultimately constructing the subcritical core.
Optimize the neutronics performance of the subcritical core through radiation transport and nuclide depletion simulations using state‑of‑the‑art codes and tools.
Calculate core criticality, reactivity coefficients, and fuel burnup; provide heating data to CFD analysts; estimate radiation damage in structural components; design and analyze radiation shielding.
Work closely with accelerator scientists and CFD analysts to optimize the proton‑beam‑on‑target parameters.
Interact with scientific and technical collaborators and other external stakeholders across laboratories.
Work with the leadership team on developing & tracking key company technical milestones, ensuring delivery of results within aggressive timelines in a complex, fast‑paced environment.
Document work in written reports, presentations, and regulatory submissions.
About You:
Ph.D. (preferred) or M.S. in nuclear engineering, or similar field.
Demonstrated expertise performing radiation transport simulations of fission systems (MCNP experience preferred) to calculate reactivity coefficients, heat loads, and radiation damage.
Productive yet careful analyst whose results when shared can be trusted as correct.
Strong work ethic, resilient, able to work in a fast‑paced environment, driven, passionate about the field.
Export control restrictions limit us to candidates who are U.S. citizens or U.S. permanent residents (green card holders).
Pluses:
Experience using unstructured mesh geometries in MCNP and automated optimization algorithms (e.g., DAKOTA).
Experience in charged particle transport simulations and accelerator‑driven subcritical core design.
Experience analyzing fast‑spectrum cores, in particular cores cooled by heavy liquid metal.
Experience interacting with the Nuclear Regulatory Commission.
Record of technical accomplishment through publications and presentations.
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 salary 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.
Seniority level Associate
Employment type Full‑time
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About Subcritical Systems Inc.
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 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, work towards licensing, regulatory submissions and construction of its first energy amplifier.
About the Role
We are seeking a creative and dynamic Nuclear Engineer to join our growing team in a full‑time, on‑site role located in Austin, TX. In this role you will lead the neutronics design of the subcritical core. This is an ideal role for an ambitious, creative and hard‑working engineer who wants to use their expertise to transform the energy system and in so doing change the world.
Responsibilities:
Serve as an integral member of the subcritical core team responsible for designing, prototyping, and ultimately constructing the subcritical core.
Optimize the neutronics performance of the subcritical core through radiation transport and nuclide depletion simulations using state‑of‑the‑art codes and tools.
Calculate core criticality, reactivity coefficients, and fuel burnup; provide heating data to CFD analysts; estimate radiation damage in structural components; design and analyze radiation shielding.
Work closely with accelerator scientists and CFD analysts to optimize the proton‑beam‑on‑target parameters.
Interact with scientific and technical collaborators and other external stakeholders across laboratories.
Work with the leadership team on developing & tracking key company technical milestones, ensuring delivery of results within aggressive timelines in a complex, fast‑paced environment.
Document work in written reports, presentations, and regulatory submissions.
About You:
Ph.D. (preferred) or M.S. in nuclear engineering, or similar field.
Demonstrated expertise performing radiation transport simulations of fission systems (MCNP experience preferred) to calculate reactivity coefficients, heat loads, and radiation damage.
Productive yet careful analyst whose results when shared can be trusted as correct.
Strong work ethic, resilient, able to work in a fast‑paced environment, driven, passionate about the field.
Export control restrictions limit us to candidates who are U.S. citizens or U.S. permanent residents (green card holders).
Pluses:
Experience using unstructured mesh geometries in MCNP and automated optimization algorithms (e.g., DAKOTA).
Experience in charged particle transport simulations and accelerator‑driven subcritical core design.
Experience analyzing fast‑spectrum cores, in particular cores cooled by heavy liquid metal.
Experience interacting with the Nuclear Regulatory Commission.
Record of technical accomplishment through publications and presentations.
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 salary 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.
Seniority level Associate
Employment type Full‑time
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