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%)