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Salary
$68k – $88k per year
Location
In office (Oak Ridge)
Seniority
Senior · 5+ years exp
Visa
H-1B filings in 12 months: 3
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Oct 16, 2026.

Overview
Company
Impact
Profile match
X-energy is an advanced nuclear reactor and fuel company headquartered in Rockville, Maryland, developing the Xe-100 high-temperature gas-cooled small modular reactor and the TRISO-X fuel that powers it. Founded in 2009, it has further offices and sites in Frederick, Maryland and Oak Ridge, Tennessee, where its fuel fabrication facility is being built, and works with utility and industrial partners on first deployments of its reactors in the United States. It recruits mechanical, electrical, fuel and thermal hydraulics engineers, project controls and supply chain specialists, procurement and purchasing staff, construction field engineers and corporate functions such as HR and recruiting.
Backed by G Squared

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

The Assistant Project Manager is a developing project management role that supports the planning, coordination, and execution of large-scale projects and high-level programs at TRISO-X - working under the general supervision of senior project managers and project leadership while steadily building the skills to lead independently. You'll partner across the full project ecosystem - project controls, engineering, licensing, supply chain, quality, safety, manufacturing, testing, operations, and construction - gaining hands-on exposure to how first-of-a-kind nuclear programs come together. As you apply and grow your technical and programmatic skills on routine to moderately complex assignments, you'll take on increasing latitude for independent judgment: supporting project managers in identifying and resolving issues that affect cost and schedule performance, spotting opportunities to improve execution, and helping direct external subcontracted teams and internal matrixed teams.

We're looking for a project professional who's eager to learn, detail-oriented, and ready to grow in a fast-paced, mission-driven environment: someone who thrives on coordination, communicates clearly across technical and non-technical audiences, and wants to develop into a full project manager under the mentorship of experienced leaders. This is a role designed for growth - every assignment builds the foundation for greater responsibility, autonomy, and impact on programs that are advancing clean, reliable nuclear energy at scale.

Job Profile Tasks/Responsibilities:

  • Support and contribute to planning, coordination, and execution of complex, technically challenging projects in alignment with project objectives, schedules, budgets, and deliverable requirements.
  • Track project deliverables, interfaces, action items, decisions, assumptions, and technical issues to support disciplined project execution. Provide technical inputs and coordinate activities across multidisciplinary engineering teams and cross-functional partners, including project controls, licensing, supply chain, quality, safety, manufacturing, testing, operations, and construction.
  • Coordinate with internal and external stakeholders to help ensure technical requirements, deliverable expectations, design interfaces, and execution dependencies are understood and managed.
  • Support identification of technical, schedule, cost, and execution risks and assist in developing mitigation strategies in coordination with senior engineers/managers and project leadership.
  • Develop information to support problem resolution, support make/buy decisions, and coordinate supplier technical coordination, subcontractor interfaces, and external partner execution activities.
  • Support project management evaluation and decision making on acceptability of work products, deliverables, processes and procedures, and project performance to achieve customer’s performance, quality, safety, operational, and programmatic requirements in line with project governance. Ensure activities are performed in accordance with applicable company processes, procedures, quality requirements, and regulatory expectations.
  • Actively support the safety culture and ensure integration of quality in all relevant processes by complying with the requirements of the Quality Assurance Program.
  • Seek feedback and guidance from more experienced team members and continue developing knowledge of project management best practices, execution standards, and integration methodologies.
  • Continue developing subject matter knowledge in project planning and execution and support continuous improvement of project delivery processes, tools, and standards.
  • Maintain professional demeanor and behavior at all times 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.
  • Level II: In addition to the above: Plan, coordinate, and execute moderately complex, technically challenging projects in alignment with project objectives, schedules, budgets, and deliverable requirements, under the general guidance of senior project managers.
  • Level III: Provide feedback and informal guidance to less experienced team members, sharing knowledge related to project management best practices, execution standards, and integration methodologies, under the guidance of senior project managers.

Job Profile Minimum Qualifications:

  • Bachelor’s degree in engineering, physics, construction sciences, project management or related technical field from an accredited college or university, or equivalent work experience with post-secondary training/education.
  • Basic knowledge of project execution practices, interface management, schedule coordination, work control, and technical documentation control.
  • Demonstrated inquisitive nature, clarity of thought, and willingness, capability, and resilience to develop fundamental understanding and factual basis of problems and challenges.
  • Developing experience supporting the coordination and execution of work scope with multidisciplinary teams in a project-based environment.
  • Developing experience supporting project execution activities and assisting with resolution of routine, well-defined issues or emerging problems under close supervision.
  • Developing analytical, organizational, and problem-solving skills, with the ability to manage assigned tasks and support established priorities.
  • Effective written and verbal communication skills, with the ability to communicate clearly with technical and non-technical team members.
  • Demonstrate innovative, inquisitive, and expansive use of Artificial Intelligence (AI) tools, software, and Microsoft Office products to compile, collate, analyze, visualize, and generate concise information for reporting and management decisions.
  • Level I: The skills required for this role are typically demonstrated by 0-2 years of relevant experience. Project Engineering, Project Management, or related experience in the commercial construction, energy, nuclear, petrochemical, or high-technology hardware development industry or three to five years of military experience; relevant internship, co-op, or academic project experience may be considered.
  • Level II: The skills required for this role are typically demonstrated by 3 plus years of relevant experience. Typically, two to five years of Engineering, Project Engineering, Project Management, or related experience in the commercial construction, energy, nuclear, petrochemical, or high-technology hardware development industry or three to five years of military experience; relevant internship, co-op, or academic project experience may be considered.
  • Level III: Typically, five to seven years of Engineering, Project Engineering, Project Management, or related experience in the commercial construction, energy, nuclear, petrochemical, or high-technology hardware development industry or three to five years of military experience; relevant internship, co-op, or academic project experience may be considered.

Location: 151 Lafayette Drive, Oak Ridge, TN 37830

Work Site Expectations: 5 days onsite

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: $68,250- $87,500, Level II: $88,750 to $102,500, Level III: $107500 - $125K

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/ProfessionalDevelopment 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.

X Energy, LLC participates in E-Verify. Please visit the links below for more information about E-Verify and the protection of your Right to Work.

Right To Work Link: If you have the right to work, don't let anyone take it away (e-verify.gov)

E-Verify Participation Link: E-Verify Participation Poster English and Spanish

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