Contract Nuclear Criticality Safety Engineer Jobs

Location: Knoxville, TN (Client Sites as Required) Employment Type: Full-Time

Clearance: Active DOE Q required

Management Solutions LLC (MSLLC) is an award-winning management consulting firm delivering solutions for our partners’ most complex challenges. Since 2002, we have supported federal and commercial clients through expertise in project and program strategy, delivery and implementation, engineering and technical advisory services, workforce solutions, and digital solutions. We are distinguished by our reputation for managing mission‑critical projects and helping organizations improve performance through innovative, people-centered solutions. MSLLC has been recognized as Small Business of the Year by the U.S. Small Business Administration, the Department of Energy, and Oak Ridge National Laboratory and has been named one of the Top Employers in the Greater Knoxville area.

At Management Solutions, we believe our people are the foundation of our success. We are committed to fostering a collaborative and caring culture where employees feel valued, supported, and empowered to grow. We seek professionals who think critically, solve complex problems, and are dedicated to building and sustaining a high‑performing, people-centered organization.

Management Solutions is seeking an experienced Nuclear Criticality Safety (NCS) Engineer to join our growing Nuclear Engineering practice. This client‑facing consulting position supports Department of Energy (DOE) National Nuclear Security Administration (NNSA), and other federal nuclear programs through the development of high-quality nuclear criticality safety analyses, engineering evaluations, and technical consulting services. This position offers opportunities to support multiple DOE facilities, collaborate with nationally recognized subject matter experts, and contribute to technically challenging projects across the nuclear enterprise.

• Develop Nuclear Criticality Safety Evaluations (NCSEs) including the underlying criticality safety analyses, calculations and technical documentation supporting operations.


• Evaluate new and existing operations, facility modifications, equipment designs, and process changes.


• Apply DOE Orders, ANSI/ANS-8 standards, client procedures, and industry best practices.


• Develop and review nuclear criticality safety controls and support implementation of engineered and administrative controls.


• Perform field walkdowns, assessments, operational support, and technical reviews.


• Perform or review analysis using SCALE/KENO or MCNP.


• Support hazards analyses, documented safety analyses, and integrated nuclear safety activities.


• Provide technical guidance and mentoring to junior engineers and participate in peer reviews.

• Bachelor's degree from an ABET-Accredited program in Nuclear Engineering, Engineering, Physics or Chemistry.


• Minimum 4 years of relevant nuclear criticality safety experience.


• Experience with SCALE/KENO or MCNP.


• Knowledge of DOE nuclear safety requirements and ANSI/ANS-8 standards.


• Excellent technical writing and communication skills.


• Prior qualification as an NCS Engineer at a DOE facility.


• Active DOE Q security clearance.

• Experience supporting Y-12 or ORNL.


• Prior qualification as an NCS Peer Reviewer at a DOE NNSA site.


• 8 years of relevant nuclear criticality safety experience.


• Bachelor’s or advanced degree in Nuclear Engineering.

U.S. citizenship is required due to federal contracting and potential security requirements.

Management Solutions LLC is an Equal Employment Opportunity (EEO) employer. We committed to providing equal employment opportunities to all employees and applicants for employment and prohibit discrimination and harassment of any kind without regard to race, color, religion, sex, age, national origin, disability, protected veteran status, sexual orientation, gender identity or expression, genetic information, or any other status protected by applicable federal, state, or local law. This policy applies to all aspects of employment, including recruiting, hiring, placement, promotion, compensation, training, transfer, leave, discipline, and termination.

If you require a reasonable accommodation to complete the application process, please contact HR or AGonzalez@managementsolutionsllc.com. We will work with you to ensure your accessibility needs are met.

• Medical


• Rx


• Dental and Vision Insurance


• Company paid short-term disability and life insurance


• 401k plan with up to a 5% match with immediate vesting


• Flexible Spending Accounts


• PTO


• Paid holidays


• and more!

This job description is intended to convey information essential to understanding the scope of the position and is not a complete list of skills, efforts, duties, responsibilities, or working conditions associated with it.

Management Solutions LLC is an Equal Employment Opportunity (EEO) employer. It is the policy of the Company to provide equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.