Xcimer Energy

Director of Nuclear Engineering

Denver, CO · Director · Part-time

Work authorization required$220k-$260kDetected 55 days ago

RESTSystems EngineeringResearchLeadershipCommunicationCollaborationMentoring

About the role

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture.
Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution.
Join us in powering a better world with inertial fusion!

Responsibilities

Build, lead, and grow the Nuclear Engineering Department, including hiring, onboarding, mentoring, and performance development of engineering staff.
Develop career paths and technical leadership pipelines for nuclear engineers while fostering a culture of technical rigor, collaboration, safety, and continuous improvement.
Establish, document, and maintain nuclear engineering standards, methods, and best practices across concept development, design, testing, and operations.
Define and maintain the nuclear design basis for Xcimer facilities and programs, ensuring assumptions, analyses, and requirements support performance, safety, and regulatory objectives.
Partner with Program Directors and Managers to ensure nuclear engineering activities are appropriately scoped, resourced, prioritized, and scheduled.
Identify nuclear engineering risks early and collaborate cross-functionally to develop and implement mitigation strategies.
Ensure disciplined execution of core nuclear engineering activities, including radiation transport and shielding analysis, activation analysis, source term definition, uncertainty analysis, and support for radiological safety and hazards analysis.
Collaborate closely with Systems Engineering, Facilities, Test, Operations, ES&H, and peer engineering departments to integrate nuclear engineering considerations into system architectures, facility designs, and operational procedures.
Represent Xcimer in technical forums and within the broader nuclear engineering community to build technical credibility and attract top-tier talent.
Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change.

Requirements

Experience with deterministic and Monte Carlo neutron/photon transport methods.
Experience using nuclear engineering analysis tools such as MCNP, OpenMC, or equivalent software.
Experience planning and managing technical work, including schedules, budgets, and performance metrics.
Experience operating effectively within matrix organizations and multidisciplinary technical environments.
Excellent written and verbal communication skills with the ability to communicate complex technical concepts to both technical and non-technical audiences.
Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.
Experience within fusion energy, high-radiation facilities, or other advanced energy systems.
Experience collaborating with national laboratories, universities, or large multi-institution technical programs.
Experience establishing engineering standards and improving technical rigor across organizations.
Education: Advanced degree in Nuclear Engineering or closely related technical field
Demonstrated experience building, mentoring, and leading high-performing technical teams.
Strong foundation in radiation physics, nuclear engineering fundamentals, and analytical methods.

Nice to have

Advanced degree in Nuclear Engineering or closely related technical field
PhD strongly preferred.

Compensation

In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown.

Benefits

Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success.
Eligible employees also receive equity, allowing them to share in the company's long-term success.
Xcimer operates under a flexible Paid Time Off (ATO) approach.
Rather than a fixed number of vacation days, employees are trusted to take the time they need to rest and recharge while meeting the expectations of their role and team.
are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.

Company info

Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible.
We are looking for a technical leader to apply their expertise in nuclear engineering, systems thinking, and organizational leadership to positively impact the future of energy!

Equal opportunity

Xcimer Energy is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force.
Xcimer Energy hires and promotes people on the basis of their qualifications, performance, and abilities.
We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork, in which all employees recognize and appreciate the diversity of individual team members.
We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, gender, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law.

Visa & Work Authorization

citizen or national, U

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This listing is sourced directly from Xcimer Energy's careers page and normalized into a canonical job model.