Assistant Systems Engineer Jobs in Tennessee (NOW HIRING)

X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualifications and responsibilities. All applications will be submitted via our company career page, www.x-energy.com/careers/. We will never ask you to provide payment information as part of the recruiting process. If anyone claiming to represent X-energy directs you in a manner otherwise, please contact us at www.x-energy.com/contact-us.

Job Description

This role is responsible for executing rigorous systems engineering processes to support the design, integration, and management of complex nuclear systems throughout their lifecycles. Working within established model-based systems engineering frameworks, this position ensures all system components work together effectively and meet project requirements. The Systems Engineer focuses on verifying and validating product requirements according to the systems engineering lifecycle process while maintaining clear documentation of design decisions and system interfaces.
This Systems Engineer III-IV role owns the complete lifecycle journey of complex nuclear fuel production systems from initial concept through operations, executing INCOSE-aligned systems engineering processes at every phase. The engineer establishes and maintains enterprise engineering procedures defining how design control, configuration management, verification & validation (V&V), and quality assurance (QA) are executed.
Throughout the lifecycle journey, the Systems Engineer owns multi-system integration and manages configuration baselines for assigned subsystems, ensuring all components work together effectively and meet NRC and DOE requirements. Core responsibilities include interface management, design change control, and comprehensive V&V activities - managing Requirements Verification Traceability Matrices (RVTM), developing and executing test plans, overseeing Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT), and applying rigorous verification methods (inspection, analysis, demonstration, and test).
The engineer manages requirements traceability using JAMA as the primary platform (IBM DOORS experience transferable) and coordinates cross-discipline activities using JIRA for project management and issue tracking. The role requires proven systems engineering leadership: translating ambiguous high-level direction into actionable plans, driving cross-functional efforts to completion with minimal oversight, and resolving stakeholder concerns through systematic problem-solving.

Job Profile Tasks/Responsibilities

• Apply systems thinking and take a holistic approach to solve problems, analyze and design systems, considering the interdependencies and interactions between various components.
• Lead and manage systems engineering lifecycle efforts surrounding:
  • Stakeholder and operational analysis
  • Requirement identification, decomposition, and management
  • Functional decomposition and modeling
  • Logical system architecture development and modeling
  • Physical product definition, interface management, and change control
  • Design integration and testing
  • System verification and validation
  • Concept of operations development and modeling
• Develop and maintain system behavior models using model-based systems engineering (MBSE) tools within established Product Lifecycle Management (PLM) frameworks.
• Lead the identification and monitoring of technical risks and the development of risk mitigation strategies.
• Support value engineering activities including cost analyses, economic feasibility assessments, and cost reduction opportunity identification.
• Write and review engineering documentation, reports, and communicate technical details and project progress to technical and non-technical stakeholders.
• Execute systems engineering processes within X-energy's quality management framework.
• Work across engineering disciplines to ensure effective integration of system components and subsystems.
• Perform work in accordance with X-energy quality assurance procedures to ensure engineering products meet required standards.
• Always maintain professional demeanor and behavior in all forms of communication.
• Perform other duties as assigned by manager.
• Level I: Assist and support team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, under guided supervision. Establish a foundation in nuclear systems design and nuclear quality assurance requirements while deepening understanding of, and experience with processes, tools, and key product and safety considerations for nuclear components, systems, and facilities.
• Level II:Support team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, under guided supervision. Coordinate with engineering team members, partners, and suppliers (where applicable) to facilitate the convergence of efforts, guide implementation, provide engineering assurance, and deliver high-quality engineering work products.
• Level III:Execute the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, under minimal supervision. Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area.
• Level IV:Lead the execution the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, without close supervision and some latitude for independent judgment. Provide feedback and guidance to more junior team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document. Lead small groups of engineers to solve complex technical problems and deliver high-quality engineering work products on time and within budget.

Job Profile Minimum Qualifications

• Bachelor's degree in industrial and systems engineering, or other engineering related discipline from an ABET accredited institution required.
• Experience and/or knowledge in the following areas:
  • System Lifecycle Processes (ISO 15288)
  • Operational & Stakeholder Analysis
  • Requirements Management
  • System Design & Interface Management
  • Design Integration & Testing
  • Verification & Validation
  • Model-Based Systems Engineering (MBSE) Tools and Methods & Product Lifecycle Management Systems
    • e.g. Teamcenter PLM, Cameo, Capella, Genesys, SysML, and DOORS
  • Systems modeling and simulation
  • Interface control and management
  • Configuration management and change control
  • Technical risk assessment and management
  • Level I: Zero years of experience in an engineering role required.
  • Level II:Typically, three years of experience in an engineering role required. A master's degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience. A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience. Previous experience at X-energy exceeding performance standards may be in lieu of years of experience.
  • Level III:Typically, five years of experience in an engineering role required. A master's degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience. A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience. Previous experience at X-energy exceeding performance standards may be in lieu of years of experience.
  • Level IV:Typically, ten years of experience in an engineering role. A master's degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience. A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience. Previous experience at X-energy exceeding performance standards may be in lieu of years of experience. Experience with systems engineering software tools.

Location: 151 Lafayette Drive, Suite 300, Oak Ridge, TN

Work Site Expectations: 5 days a week in office

Travel: 10%

Hours:8:00am-5:00pm, Mon-Fri

Compensation

As required by Maryland and other applicable state law, X Energy, LLC (X-energy) lists the expected compensation range for a publicly advertised job opportunity based upon the job requirements (e.g. education/training, experience, skill sets, etc.). Individual candidates who meet the job requirements for the posted position will be offered a salary within this range based on their respective levels of education/training, experience, and other qualifications unique to them. Salary ranges may vary based on the specific office location and region referenced in the posting to take into consideration differences in cost of living and may not be reflective of all regions. Please note that compensation ranges listed for US job postings reflect base salary only and do not include benefits or other incentives.

Offers within the posted salary range are commensurate with the individual's qualifications for the position, along with a view on internal equity, market data, and room for growth. The salary range for this position is:

Level I: $70-95k, Level II: $90-115k, Level III: $115-140K, Level IV: $145,000- $170,000

Position Job Classification

Full time - Exempt

Benefits

X Energy, LLC offers a robust benefits package that includes a 401K plan with an employer match, Medical/Dental /Vision Insurance, Life and Disability Insurance, Paid Time Off, and a Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees.

An Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

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