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Full Time Nuclear Engineering Internships Jobs in Colorado

Xcimer Energy

Director of Nuclear Engineering

Denver, CO · On-site

$220K - $260K/yr

This is a full-time, onsite role based at our headquarters in Denver, CO. As the Director of ... interns, with eligibility varying by benefit. We may use artificial intelligence (AI) tools to ...

Xcimer Energy

Director of Nuclear Engineering

Denver, CO · On-site

$220K - $260K/yr

This is a full-time, onsite role based at our headquarters in Denver, CO. As the Director of ... interns, with eligibility varying by benefit. We may use artificial intelligence (AI) tools to ...

Xcimer Energy

Director of Nuclear Engineering

Denver, CO · On-site

$220K - $260K/yr

This is a full-time, onsite role based at our headquarters in Denver, CO. As the Director of ... interns, with eligibility varying by benefit. We may use artificial intelligence (AI) tools to ...

Xcimer Energy

Director of Fusion Nuclear Science

Denver, CO · On-site

$220K - $260K/yr

This is a full-time, onsite role based at our headquarters in Denver, CO. The Director of Fusion ... This role partners closely with program and engineering leadership, and other science department ...

Xcimer Energy

Director of Fusion Nuclear Science

Denver, CO · On-site

$220K - $260K/yr

This is a full-time, onsite role based at our headquarters in Denver, CO. The Director of Fusion ... This role partners closely with program and engineering leadership, and other science department ...

Xcimer Energy

Senior Thermal Analyst

Denver, CO

$155K - $180K/yr

S. in Mechanical Engineering, Aerospace Engineering, Nuclear Engineering, or related field ... interns, with eligibility varying by benefit. We may use artificial intelligence (AI) tools to ...

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Full Time Nuclear Engineering Internships information

What is a full time nuclear engineering internship?

Full time nuclear engineering internships are structured work experiences where students or recent graduates work in the nuclear engineering field, typically for 10-12 weeks during the summer or as part of a co-op program. These internships provide hands-on experience in areas such as reactor design, radiation safety, energy production, and regulatory compliance. Interns work alongside professional engineers on real-world projects, gaining practical skills and industry knowledge that complement their academic studies. Such positions often serve as a pathway to full-time employment after graduation, while helping students build their professional networks.

What types of projects and responsibilities can I expect during a full-time nuclear engineering internship?

As a full-time nuclear engineering intern, you can expect to work on a variety of projects such as assisting with reactor design analysis, performing safety assessments, supporting research on new nuclear technologies, or contributing to regulatory compliance documentation. Interns often collaborate with senior engineers and multidisciplinary teams, gaining exposure to both technical and operational aspects of nuclear facilities. You may also participate in lab experiments, data analysis, and present findings to project teams. This role offers valuable hands-on experience and insight into the daily operations of the nuclear energy sector.

What are the key skills and qualifications needed to thrive as a full time nuclear engineering intern, and why are they important?

To thrive as a Full Time Nuclear Engineering Intern, you need a solid understanding of nuclear physics, engineering principles, and coursework toward a degree in nuclear, mechanical, or electrical engineering. Familiarity with simulation software (such as MATLAB or MCNP), CAD tools, and an understanding of industry safety protocols are commonly expected. Strong analytical thinking, teamwork, and effective communication help interns contribute to projects and adapt to the demanding regulatory environment. These skills and qualities are vital for ensuring safe operations, accurate problem-solving, and successful collaboration within nuclear engineering teams.

What is the difference between Full Time Nuclear Engineering Internships vs Nuclear Engineering Technician?

AspectFull Time Nuclear Engineering InternshipsNuclear Engineering Technician
Required CredentialsTypically pursuing or holding a bachelor's degree in nuclear engineering or related fieldAssociate degree or technical certification in nuclear technology or engineering
Work EnvironmentOffice settings, laboratories, and nuclear power plants under supervisionOperational nuclear facilities, maintenance, and testing environments
Employer & Industry UsageInternship programs at nuclear power plants, government agencies, and research labsPower plants, nuclear facilities, and industrial sites

Full Time Nuclear Engineering Internships are designed for students gaining practical experience in nuclear engineering, often as part of their academic program. Nuclear Engineering Technicians typically work in operational roles, supporting plant safety and maintenance. Internships focus on learning and development, while technician roles involve hands-on technical work.

What are the most commonly searched types of Nuclear Engineering Internships jobs in Colorado?

The most popular types of Nuclear Engineering Internships jobs in Colorado are:

What are popular job titles related to Full Time Nuclear Engineering Internships jobs in Colorado?

For Full Time Nuclear Engineering Internships jobs in Colorado, the most frequently searched job titles are:

What job categories do people searching Full Time Nuclear Engineering Internships jobs in Colorado look for?

The top searched job categories for Full Time Nuclear Engineering Internships jobs in Colorado are:

What cities in Colorado are hiring for Full Time Nuclear Engineering Internships jobs?

Cities in Colorado with the most Full Time Nuclear Engineering Internships job openings:

Full Time Nuclear Engineering Internships jobs near you
Infographic showing various Full Time Nuclear Engineering Internships job openings in Colorado as of September 2026, with employment types broken down into 1% Internship, 84% Full Time, 10% Part Time, 1% Temporary, 3% Contract, and 1% Nights. Highlights an 82% Physical, 4% Hybrid, and 14% Remote job distribution.

Director of Nuclear Engineering

Xcimer Energy

Denver, CO • On-site

$220K - $260K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 13 days ago

Key responsibilities

  • Lead and grow the Nuclear Engineering Department, including hiring, onboarding, mentoring, and performance development of engineering staff.

  • Establish, document, and maintain nuclear engineering standards, methods, and best practices across all phases of programs and facilities.

  • Ensure disciplined execution of nuclear engineering activities such as radiation transport and shielding analysis, activation analysis, and support for radiological safety and hazards analysis.

Job 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!
 
This is a full-time, onsite role based at our headquarters in Denver, CO.
 
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!
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.
Candidates may be considered for other positions at Xcimer Energy, and our actual base salary will be determined on an individual basis and may vary based on job-related knowledge and skills, education, and experience. The range is published in accordance with Colorado Equal Pay for Equal Work Act and California Equal Pay Act.
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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.