{"schemaVersion":"jobsearcher.job.v1","id":"e234ebf113f2bce1ac873d7c","url":"https://jobsearcher.com/jobs/e234ebf113f2bce1ac873d7c","canonicalUrl":"https://jobsearcher.com/jobs/e234ebf113f2bce1ac873d7c","title":"Computational Nuclear Engineer","description":"About Thea Energy:\nThea Energy is leveraging recent breakthroughs in stellarator physics and engineering to create a faster and simpler approach to commercializing fusion energy. The company is reinventing the stellarator using computer-controlled arrays of planar coils thereby replacing the intricate, complex modular magnets required in all other stellarator architectures. Thea Energy is on a mission to create a limitless source of zero emission energy for a sustainable future.\n\nPosition Overview:\nWe are seeking a highly motivated Computational Nuclear Engineer to join our team, focusing on neutronics and multiphysics simulations for stellarator fusion systems. The ideal candidate will possess a strong background in computational transport methods, with a particular emphasis on multiphysics reactor design, dose rate calculations, and radiation shielding optimization. You will work with minimal supervision, contributing to cutting-edge research and development to ensure the safety and performance of Thea Energy's stellarator systems.\n\nKey Responsibility Areas:\n\nDevelop and implement advanced workflows for high-fidelity neutronics and related multiphysics simulations in complex 3D stellarator geometries.\n\nConduct simulations of fusion blanket performance, including tritium breeding ratios (TBR), energy deposition, material activation, radiation shielding, and more.\n\nCollaborate with cross-disciplinary teams to perform multiphysics coupling (e.g., neutronics to thermal-hydraulics or structural analysis) to refine reactor designs.\n\nPerform dose rate calculations and design optimized shielding solutions for personnel and sensitive equipment.\n\nPrepare technical reports, presentations, and publications based on simulation results and optimization findings.\n\nIdeal Experience & Skillsets:\n\nPhD in Nuclear Engineering, Computational Physics, Applied Physics, or a related field with 2+ years of experience; or a Master's degree in a relevant field with 4+ years of experience.\n\nStrong knowledge of Monte Carlo radiation transport codes (e.g., OpenMC, MCNP, Serpent).\n\nProficiency in programming languages commonly used in scientific computing, specifically Python and C++.\n\nProficiency in modern scientific software development best-practices (e.g. git, GitHub, CI)\n\nExperience in multiphysics coupling frameworks (e.g., MOOSE, Cardinal, NekRS).\n\nExcellent analytical, problem-solving, and communication skills.\n\nPreferred Skills:\n\nExperience with nuclear data processing and libraries (e.g., NJOY). Experience with deterministic neutron transport solvers (e.g., Atilla, OpenSN)\n\nFamiliarity with High-Performance Computing (HPC) environments and parallel programming (MPI/OpenMP).\n\nBackground in applying machine learning techniques to optimize nuclear simulation results or data handling.\n\nUnderstanding of fusion-specific nuclear challenges, such as first-wall material damage and tritium fuel cycle management.\n\nPersonal Attributes:\n\nAbility to work independently and manage projects with minimal supervision in a startup environment.\n\nStrong attention to detail and a passion for advancing the field of fusion energy research.\n\nWillingness to collaborate with a diverse team of scientists and engineers within the company and externally.\n\nPersistent optimism and a willingness to take on tough challenges.\n\nExcited to think creatively about solutions to difficult problems and not relying solely on what has been done before.\n\nCompany Benefits:\n\nSalary range: $120,000-$180,000\n\nComprehensive health benefits (e.g. medical/dental/vision)\n\nEmployee equity stock options\n\n20 days PTO\n\nDiversity and Inclusion:\nThea Energy is an equal opportunity employer committed to creating a company of diverse backgrounds. By creating a diverse environment, we will bring new ideas and approaches to solving some of the world’s hardest (and most important) problems. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, sexual orientation, gender identity or expression, national origin, family or marital status, age, disability, veteran's status, or other characteristic protected by applicable laws and regulations.\n\n#J-18808-Ljbffr","company":"Socket","rawCompany":"socket","city":"Kearny","state":"NJ","isRemote":false,"isActive":false,"createdAt":"2026-09-09T04:04:17.468Z","occupations":[{"code":"17-2161.00","title":"Nuclear Engineers","slug":"nuclear-engineers"},{"code":"19-2012.00","title":"Physicists","slug":"physicists"},{"code":"17-2199.00","title":"Engineers, All Other","slug":"engineers-all-other"}],"industries":[{"code":"541715","title":"Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)","slug":"research-and-development-in-the-physical-engineering-and-life-sciences-except-nanotechnology-and-biotechnology"},{"code":"221113","title":"Nuclear Electric Power Generation","slug":"nuclear-electric-power-generation"},{"code":"541330","title":"Engineering Services","slug":"engineering-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Computational Nuclear Engineer","description":"About Thea Energy:\nThea Energy is leveraging recent breakthroughs in stellarator physics and engineering to create a faster and simpler approach to commercializing fusion energy. The company is reinventing the stellarator using computer-controlled arrays of planar coils thereby replacing the intricate, complex modular magnets required in all other stellarator architectures. Thea Energy is on a mission to create a limitless source of zero emission energy for a sustainable future.\n\nPosition Overview:\nWe are seeking a highly motivated Computational Nuclear Engineer to join our team, focusing on neutronics and multiphysics simulations for stellarator fusion systems. The ideal candidate will possess a strong background in computational transport methods, with a particular emphasis on multiphysics reactor design, dose rate calculations, and radiation shielding optimization. You will work with minimal supervision, contributing to cutting-edge research and development to ensure the safety and performance of Thea Energy's stellarator systems.\n\nKey Responsibility Areas:\n\nDevelop and implement advanced workflows for high-fidelity neutronics and related multiphysics simulations in complex 3D stellarator geometries.\n\nConduct simulations of fusion blanket performance, including tritium breeding ratios (TBR), energy deposition, material activation, radiation shielding, and more.\n\nCollaborate with cross-disciplinary teams to perform multiphysics coupling (e.g., neutronics to thermal-hydraulics or structural analysis) to refine reactor designs.\n\nPerform dose rate calculations and design optimized shielding solutions for personnel and sensitive equipment.\n\nPrepare technical reports, presentations, and publications based on simulation results and optimization findings.\n\nIdeal Experience & Skillsets:\n\nPhD in Nuclear Engineering, Computational Physics, Applied Physics, or a related field with 2+ years of experience; or a Master's degree in a relevant field with 4+ years of experience.\n\nStrong knowledge of Monte Carlo radiation transport codes (e.g., OpenMC, MCNP, Serpent).\n\nProficiency in programming languages commonly used in scientific computing, specifically Python and C++.\n\nProficiency in modern scientific software development best-practices (e.g. git, GitHub, CI)\n\nExperience in multiphysics coupling frameworks (e.g., MOOSE, Cardinal, NekRS).\n\nExcellent analytical, problem-solving, and communication skills.\n\nPreferred Skills:\n\nExperience with nuclear data processing and libraries (e.g., NJOY). Experience with deterministic neutron transport solvers (e.g., Atilla, OpenSN)\n\nFamiliarity with High-Performance Computing (HPC) environments and parallel programming (MPI/OpenMP).\n\nBackground in applying machine learning techniques to optimize nuclear simulation results or data handling.\n\nUnderstanding of fusion-specific nuclear challenges, such as first-wall material damage and tritium fuel cycle management.\n\nPersonal Attributes:\n\nAbility to work independently and manage projects with minimal supervision in a startup environment.\n\nStrong attention to detail and a passion for advancing the field of fusion energy research.\n\nWillingness to collaborate with a diverse team of scientists and engineers within the company and externally.\n\nPersistent optimism and a willingness to take on tough challenges.\n\nExcited to think creatively about solutions to difficult problems and not relying solely on what has been done before.\n\nCompany Benefits:\n\nSalary range: $120,000-$180,000\n\nComprehensive health benefits (e.g. medical/dental/vision)\n\nEmployee equity stock options\n\n20 days PTO\n\nDiversity and Inclusion:\nThea Energy is an equal opportunity employer committed to creating a company of diverse backgrounds. By creating a diverse environment, we will bring new ideas and approaches to solving some of the world’s hardest (and most important) problems. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, sexual orientation, gender identity or expression, national origin, family or marital status, age, disability, veteran's status, or other characteristic protected by applicable laws and regulations.\n\n#J-18808-Ljbffr","datePosted":"2026-09-09T04:04:17.468Z","dateModified":"2026-09-09T04:04:17.468Z","hiringOrganization":{"@type":"Organization","name":"Socket","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Kearny","addressRegion":"NJ","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"e234ebf113f2bce1ac873d7c"},"url":"https://jobsearcher.com/jobs/e234ebf113f2bce1ac873d7c"}}