Nuclear Criticality Safety Engineer

Come join us at Terrestrial Energy, a US developer of advanced, Generation IV nuclear reactors. We are growing our workforce to develop and deploy our Integral Molten Salt Reactor (IMSR) small modular nuclear plant to provide cost-competitive, clean firm heat and power to industry. The Company has recently completed a merger creating a publicly listed operating company (NASDAQ “IMSR”), to secure the capital resources for our next growth phase. With the current alignment of US Federal and State government, as well as industry interest in Small Modular Reactor (SMR) and advanced reactor technologies such as Terrestrial Energy’s IMSR, there is today a unique and compelling opportunity to participate in the execution of the company’s growth business plan. The Company Is Building a Team Of High-performing Business Professionals And Leaders In Engineering, R&D, Product Management And Business Development Areas At Our Charlotte, North Carolina Headquarters And Future Project Sites. We Are Looking For Talented Individuals Who Can Help Build The Organization, Processes, And Goal-orientated Corporate Culture To Lead The Company In Our Expansion. We Are Seeking People Who Have US market experience and perspectives bringing good judgement and innovative approaches to problem solving and business plan execution. Have demonstrated exceptional performance in past engineering projects. Offer exceptional leadership and team building capabilities. Have a deep understanding of the requirements for advanced reactor development. Can assist in the creation of the discipline and organized company structure, and contributed to a culture of excellence, necessary for the development and deployment of the Company’s IMSR plant. Can thrive in a fast growing business environment, and are capable of flexibility and adaptability at a time of organizational change. Have the specific skillset and experience for the following role: Responsibilities The Safety Manager, under the direction of the Engineering Director, is primarily responsible for leading and building our safety analysis team, establishing and growing a world-class safety analysis organization while managing all aspects of safety analysis and supporting regulatory compliance and licensing activities for the development and deployment of our IMSR technology. The successful candidate will recruit, develop, and lead a team of safety engineers and analysts, collaborate closely with the design and licensing teams, and ensure the safety case for our advanced reactor design meets all regulatory requirements and demonstrates the inherent safety features of our technology. Other responsibilities include: Leadership and Team Management Lead, mentor, and develop a team of Safety Analysis Engineers, Safety Analysts, and Specialists Establish team priorities, allocate resources, and manage workload across multiple projects Conduct performance evaluations and support professional development of team members Foster a culture of technical excellence, safety consciousness, and continuous improvement Recruit and build a high-performing safety analysis team Establish and maintain safety analysis standards, procedures, and best practices Manage departmental budget and resource planning Safety Analysis Program Management Oversee deterministic and probabilistic safety analyses for the IMSR design Direct the development and analysis of Design Basis Accidents (DBAs) and Beyond Design Basis Accidents (BDBAs) Ensure comprehensive transient and accident analyses using thermal-hydraulic and neutronics codes Oversee evaluation of plant response to postulated initiating events Manage assessment of safety systems and engineered safety features performance Direct dose consequence and radiological release scenario analyses Oversee sensitivity and uncertainty analyses programs Ensure integration of safety analyses across multiple engineering project teams Regulatory and Licensing Leadership Prepare safety analysis chapters for licensing documentation including Preliminary Safety Analysis Report (PSAR) and Final Safety Analysis Report (FSAR) for NRC/CNSC licensing Oversee development of DOE-required safety analyses including Preliminary Documented Safety Analysis (PDSA) and Documented Safety Analysis (DSA) in accordance with DOE-STD-3009 Direct development of key safety decisions including target performance of structures, systems, and components (SSCs), safety system responses to normal and off-normal operations, and facility security considerations Establish classification rules and terminology for safety SSCs, including application of the hierarchy of controls and Defense in Depth principles to ensure safety Oversee analysis of most limiting potential dose consequences (e.g., unmitigated or Maximum Hypothetical Accident scenarios) to support Natural Phenomena Hazard (NPH) Design Category (NDC) categorization Ensure validity assessment of selected safety document format and content, applicability of SSC classifications, and other graded approaches Lead regulatory review processes and coordinate responses to technical questions from regulatory bodies (CNSC, NRC, DOE) Ensure all analyses comply with applicable regulatory requirements and guidance Represent the company in regulatory meetings and technical discussions Oversee development of technical specifications and operational limits Manage external consultants and contractors supporting safety analysis activities Strategic Planning and Communication Develop long-term safety analysis strategy aligned with company licensing and deployment goals Collaborate closely with licensing team to support regulatory submissions and licensing strategy Identify and implement improvements to safety analysis methods and tools Present safety analysis results and strategies to senior leadership and board of directors Interface with Engineering Director and executive team on safety-related decisions Coordinate with other engineering managers to ensure integrated safety approach Support business development activities with safety analysis expertise Represent the company at industry conferences and technical forums Modeling and Simulation Develop and validate computer models for safety analysis using industry-standard codes Build thermal-hydraulic models of reactor systems and components Perform single and coupled physics simulations Validate models against experimental data and benchmarks Document modeling assumptions, methodologies, and results Documentation and Reporting Prepare detailed technical reports documenting analysis methodologies, assumptions, and results Create clear visualizations and presentations of analysis results Maintain comprehensive documentation of safety analysis activities Contribute to technical publications and conference papers Develop and maintain analysis procedures and quality assurance documentation Collaboration Work closely with Physics, Thermal-Hydraulics, Systems Engineering, and Design Teams Interface with external partners including national laboratories and consultants Participate in design reviews and technical meetings Support integrated safety assessments across multiple disciplines Contribute to continuous improvement of safety analysis methods Quality Assurance and Documentation Ensure comprehensive documentation of safety analysis methodologies, assumptions, and results Maintain quality assurance program for safety analysis activities Oversee configuration management of safety analysis models and tools Ensure compliance with nuclear quality assurance requirements (CSA N286.7, 10 CFR 50 Appendix B, NQA-1, DOE O 414.1D) Manage internal and external technical reviews of safety analysis work Requirements M.Sc. or Ph.D. in Nuclear Engineering, Mechanical Engineering, Chemical Engineering, or related field; Professional Engineer (P.Eng.) designation or equivalent professional certification preferred Experience Minimum 8 years of experience in nuclear safety analysis Minimum 3 years of leadership or management experience, preferably managing technical teams Demonstrated experience leading safety analysis programs for nuclear facilities Experience with regulatory licensing processes (NRC, CNSC, or DOE) Proven track record of successful regulatory interactions and licensing document preparation Experience managing multiple projects and priorities simultaneously Technical Skills Proficiency with thermal-hydraulic analysis codes (Flownex, REPLAP5, or similar) Knowledge of neutronics codes (MCNP, SCALE, Serpent, or similar) Understanding of severe accident phenomena and analysis methods Familiarity with probabilistic risk assessment (PRA) concepts Strong analytical and problem-solving skills Proficiency with technical computing tools (MATLAB, Python, or similar) Experience with data analysis and visualization Professional Skills Excellent technical writing and documentation skills Strong attention to detail and commitment to quality Ability to work independently and as part of a team Effective communication skills for technical and non-technical audiences Project management and time management capabilities Critical thinking and ability to defend technical positions Assets Experience with advanced reactor designs or Generation IV systems Familiarity with molten salt reactor technology and safety characteristics Experience with US NRC, US DOE, or Canadian CNSC licensing processes Knowledge of relevant regulatory guides and industry standards (NUREG, CSA, IAEA, DOE STD-1189, DOE-STD-3009, 10 CFR 830) Experience with severe accident analysis codes Background in probabilistic risk assessment (PRA) or probabilistic safety assessment (PSA) Experience with uncertainty quantification methods Knowledge of source term analysis and radiological consequence modeling Knowledge of international nuclear safety standards (IAEA, WENRA) Experience with digital instrumentation and control safety analysis Previous experience in consulting or vendor roles supporting multiple nuclear projects Publications in peer-reviewed journals or conference proceedings Active participation in industry standards development (ANS, ASME, CSA) Benefits Extended Healthcare Plan (Medical, Disability, Dental & Vision), + an additional Health Spending Account A vacation policy designed to support your work-life balance EAP Programs available to you and your family Wellness Subsidy Annual Performance Review Paid United Way Volunteer Days – A chance to give back! Candidates must be legally authorized to work in the US without the need for sponsorship for employment visa status. Terrestrial Energy Requires That The Successful Candidate Be Able To Access And Use Information Subject To U.S. Export Control Laws, Which Mandate All Citizenships (including Dual Citizenships) Be From The U.S. Department Of Energy’s List Of Generally Authorized Countries (10 CFR Part 810 Appendix A And Can Be Found Here A to Part 810). Unless a specific authorization from the U.S. Department of Energy is obtained or unless you are a U.S. citizen, U.S. national, U.S. permanent resident, or protected individual under the U.S. Immigration and Naturalization Act (8 U.S.C. 1324b(a)(3)). Additional information can be found here: Terrestrial Energy Inc. is an equal opportunity employer and does not discriminate on the basis of any legally protected status or group. We encourage applications from all qualified individuals. If you require accommodation during the application or interview process, please advise us as soon as possible so appropriate arrangements can be made. If you require technical support in a format that is accessible to you, please contact View email address on click.appcast.io. #J-18808-Ljbffr