System Design Engineer

Position Summary System One is seeking a System Design Engineer to support advanced nuclear reactor projects. This role focuses on system design, analysis, and supplier oversight, supporting complex fluid systems within a highly regulated environment. The ideal candidate will act as a system-level engineer, working across multiple disciplines to develop, integrate, and refine system designs from concept through commissioning. This is a highly collaborative role within a high-performing team of engineers and scientists. Responsibilities Design fluid systems from requirements development through final design and commissioning Perform technical trade studies to refine system performance and design decisions Oversee suppliers during development and fabrication of processing, filtration, and monitoring equipment Review component designs and assess impacts on overall system performance Develop system-level engineering documentation, including technical specifications and operational narratives Identify and resolve system integration issues across plant-level designs Support and participate in design reviews throughout the project lifecycle Develop and review technical documents such as System Design Descriptions (SDDs), Interface Control Documents (ICDs), and Engineering Design Specifications Generate complete design packages including calculations, reports, drawings, and specifications Coordinate development of P&IDs, 3D models, and system interface drawings Collaborate with cross-functional teams (mechanical, I&C, civil, nuclear) to define system requirements and performance criteria Support testing programs including planning, execution oversight, and evaluation of results Apply relevant design codes and standards including ASME BPVC and B31.3 Qualifications Bachelor’s degree in Mechanical, Chemical, Nuclear Engineering, or related field 5+ years of experience in system design or mechanical systems engineering Experience with piping systems and ability to read and develop P&IDs Experience working with suppliers on development and fabrication of equipment Strong understanding of applicable design codes (ASME, BPVC, API) Familiarity with system classifications (safety-related/non-safety-related) Experience with piping design and analysis Experience working within quality programs (NQA-1, AS9100, ISO 9001, or similar) Strong problem-solving skills with ability to manage competing priorities and constraints Excellent communication, technical writing, and collaboration skills High attention to detail and commitment to technical excellence Preferred Qualifications Experience in nuclear, power generation, or other highly regulated industries Experience supporting system integration and plant-level design Familiarity with advanced reactor technologies Work Environment Combination of office and engineering design work Standard work environment with extended periods of sitting and computer use Occasional lifting up to 25 lbs Travel required (10–20%) #J-18808-Ljbffr