Home › Companies › Xcimer › Director of Nuclear Engineering
Director of Nuclear Engineering
Xcimer · Denver, CO · On Site · Active · $190,000–$220,000 / year · Lever
Job facts
| Field | Value |
|---|---|
| Company | Xcimer |
| Title | Director of Nuclear Engineering |
| Normalized title | - |
| Department / team | Engineering / Nuclear Engineering |
| Location | Denver, CO, United States |
| Work model | On Site |
| Employment type | Full Time |
| Salary | $190,000–$220,000 / year |
| Status | active |
| ATS provider | Lever |
| Posted / first seen | 2026-05-28 / 2026-05-29 |
| Changed / last seen | 2026-05-29 / 2026-06-06 |
Related slices
| Page | What it contains | Open |
|---|---|---|
| Company jobs | Active postings from Xcimer. | Open |
| Company breakdowns | Role, location, ATS, and work model facets for this company. | Open |
| ATS provider jobs | Active postings observed through Lever. | Open |
| Provider filtered search | The same provider as a filtered job collection. | Open |
| City jobs | Active postings in Denver. | Open |
| Department jobs | Active postings in Engineering. | Open |
| Work model jobs | Active On Site postings. | Open |
| Lifecycle events | Open, update, close, and reopen events for this posting. | Open |
| Original posting | Canonical source or apply URL captured from the ATS. | Open |
Linked records
| Company | Xcimer |
| Source | 34ba15eb-dcf2-4de1-ba3f-96f8793ede64 |
| ATS provider | Lever |
Description
Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!
As the Director of Nuclear Engineering , you will lead and grow Xcimer’s Nuclear Engineering discipline, ensuring the company applies rigorous nuclear engineering practices across all programs, facilities, and lifecycle phases. You will serve as a technical authority within Xcimer’s matrix engineering organization, partnering closely with Program leadership and peer Department Heads to establish standards, mentor engineers, and ensure high-quality technical execution. 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 Employment 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. Xcimer Energy will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws. For more information on “EEO Is the Law,” please see here and here .
Benefits
Xcimer offers a comprehensive benefits package designed to support employee health, well-being, and long-term success. Benefits include medical, dental, and vision coverage; basic and supplemental life insurance; short- and long-term disability; paid parental leave for employees at the time of birth or adoption; and a 401(k) with a company match of up to 6%. 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. In addition, employees receive paid sick time, 13 company-paid holidays, and an annual paid company shutdown. Benefits are available to regular employees, including part-time and fixed-term roles, as well as interns, with eligibility varying by benefit.
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.
Define and execute a long-term roadmap for nuclear engineering capability growth, including external partnerships with national laboratories, academic institutions, and industry collaborators.
Represent Xcimer in technical forums and within the broader nuclear engineering community to build technical credibility and attract top-tier talent.
Qualifications
Education: Advanced degree in Nuclear Engineering or closely related technical field; PhD strongly preferred.
Experience: 15+ years of experience in nuclear engineering, including senior technical leadership responsibilities.
Demonstrated experience building, mentoring, and leading high-performing technical teams.
Strong foundation in radiation physics, nuclear engineering fundamentals, and analytical methods.
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.
Desired
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.
Publication record or recognized technical leadership within the nuclear engineering community.
Full job record
| Job ID | 7d51824865cb1bc540b2bbb1a39aee30debfa257 |
| Org ID | 92a4410e-e89a-46fd-b77b-9d85b9bbfdaf |
| Source ID | 34ba15eb-dcf2-4de1-ba3f-96f8793ede64 |
| Board ID | 34ba15eb-dcf2-4de1-ba3f-96f8793ede64 |
| Provider | lever |
| Provider Job Key | 9d39af93-dec5-4558-9c1a-cfdfb22a1b7a |
| Title | Director of Nuclear Engineering |
| Normalized Title | — |
| Status | active |
| Active | yes |
| Location Text | Denver, CO |
| Department | Engineering |
| Team | Nuclear Engineering |
| Employment Type | Full-Time |
| Workplace Type | on_site |
| Remote Policy | — |
| Country | United States |
| Region | CO |
| City | Denver |
| Salary Raw | USD 190000-220000 per-year-salary |
| Salary Min | 190,000 |
| Salary Max | 220,000 |
| Salary Currency | USD |
| Salary Period | year |
| Source URL | https://jobs.lever.co/xcimer/9d39af93-dec5-4558-9c1a-cfdfb22a1b7a |
| Apply URL | https://jobs.lever.co/xcimer/9d39af93-dec5-4558-9c1a-cfdfb22a1b7a/apply |
| First Seen At | 2026-05-29 07:08:24Z |
| Last Seen At | 2026-06-06 19:52:20Z |
| Last Checked At | 2026-06-06 19:52:20Z |
| Last Changed At | 2026-05-29 07:08:24Z |
| Inactive At | — |
| Source Posted At | 2026-05-28 01:26:23Z |
| Source Updated At | — |
| Raw Payload Uri | s3://job-postings-prod-raw-590183727216/raw/provider=lever/board=xcimer/date=2026-06-06/2026-06-06T19-52-19-180Z-31cc789cd738c8b1fb8a28e511fc7c301eff24e05df730895eaae921bbdbfe33.json |
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