Jr - Level Nuclear Engineer

Jr-Level Nuclear Engineer

Amentum is a global leader in advanced engineering and innovative solutions, supporting critical missions across defense, intelligence, energy, and civilian sectors. Our people are our competitive advantage, driven by purpose, collaboration, and a commitment to delivering excellence for our customers and communities. We are currently seeking a Jr-Level Nuclear Engineer to support our Nuclear Project – Oak Ridge.

Description:

As a Jr‑level Nuclear Engineer, you will support the design, analysis, and evaluation of nuclear systems, components, and facilities for industrial and government clients. This role involves assisting senior engineers and project managers with nuclear engineering calculations, technical evaluations, document preparation, and design support activities related to criticality safety, reactor systems, radiation protection, shielding, thermal‑hydraulics, and nuclear safety.

The successful candidate will collaborate with multidisciplinary design teams to deliver fully coordinated, high‑quality engineering packages, while adhering to Amentum’s engineering procedures, regulatory requirements, and quality standards.

Key Responsibilities:

• Assist senior engineers with the analysis and design support of nuclear systems and components
• Perform basic engineering calculations under direct supervision, such as:
  • Criticality Safety Evaluations
  • Reactor physics or neutronics calculations
  • Radiation dose and shielding evaluations
  • Thermal‑hydraulic calculations
  • Source term calculations (as applicable)
• Support preparation, review, and revision of engineering documents including:
  • Engineering calculations and technical reports
  • Safety analysis documentation
  • Design drawings and specifications
• Review and apply applicable codes, standards, and regulations (e.g., NRC regulations, DOE Orders, ASME, ANSI)
• Assist with configuration management, document control, and design change processes
• Attend project meetings, design reviews, and training sessions as required
• Maintain organized project files, calculations, and technical documentation
• Follow established nuclear safety, quality assurance, and engineering procedures
• Provide support for system walkdowns, testing, or field activities when required

Basic Qualifications:

• B.S. in Nuclear Engineering from an ABET‑accredited engineering program
• 0 to 5 years of experience in nuclear, industrial, or government engineering environments (academic, internship, or co‑op experience acceptable)
• Ability to work in a team of engineers and designers to complete assigned technical tasks within established budgets and schedules
• Familiarity with nuclear engineering fundamentals, including reactor theory, radiation, and thermal sciences
• Exposure to or familiarity with engineering analysis tools and software (e.g., MCNP, SCALE, Excel, or similar)
• Knowledge of applicable nuclear codes, standards, and regulatory frameworks (e.g., NRC, DOE, ASME)
• Strong organizational skills and attention to detail

Preferred Qualifications:

In addition to the Basic Qualifications, the ideal candidate might also have:

• Engineering‑in‑Training (EIT) certification, or ability to obtain
• Strong analytical, problem‑solving, and technical writing skills
• Proficiency with Microsoft Office (Excel, Word, Outlook)
• Familiarity with nuclear safety analysis, shielding analysis, or criticality safety fundamentals
• Self‑motivated and team‑oriented professional with high personal integrity

Work Environment:

• Primarily office‑based work in a secure engineering environment
• Amentum office location is preferred; hybrid or remote work may be available by prior agreement based on role and project requirements
• Occasional exposure to nuclear or industrial facilities, which may include controlled areas, elevated noise levels, or hazardous materials
• Site visits may be required

Physical Requirements: 

• Ability to sit or stand for extended periods
• Ability to lift up to 35 lbs occasionally
• Vision correctable to 20/20
• Ability to read and use engineering software and technical documentation effectively
• Appropriate PPE and training will be provided as required

Compliance & Eligibility Requirements:

• U.S. Citizenship required (no dual citizenship)
• Valid driver’s license is required
• Ability to obtain and maintain a security clearance
• Ability to pass pre‑employment background investigation and drug screening
• Willingness to work overtime or outside normal hours as needed
• Professional appearance appropriate for a customer‑facing engineering environment
• Travel required: less than 10%

Essential Functions:
Intermittent sitting, walking, standing, bending, squatting, climbing, kneeling, twisting, and lifting. Lifting requirements limited to 20 lbs. in the form of supplies, drawings, etc. Longest distance carried of 50 feet. Hand manipulation is required for simple grasping, pushing and pulling, and fine manipulation. Right and/or left hands utilized. Occasional need to reach and/or work above the shoulder, for supplies, as well as below the shoulder for same. No foot controls necessary. Must be alert to equipment in the field, there will be occasional travel, may work near construction job site equipment when in the field, occasional need to work near hazardous equipment and machinery, occasional need to walk on uneven ground, exposure to dust, gas or fumes, exposure to noise, extremes in temperature or humidity, and potential work at heights.  

At Amentum, we help prepare people for new opportunities and challenges. With positions at every level, openings in multiple disciplines, expertise in a range of markets and offices around the globe, we create an environment where you can learn, grow, and thrive. From our competitive benefits program to our Health and Safety initiative of zero workplace injuries, we believe that you'll find a flourishing career here at Amentum.

Other Essential Functions
U.S. Citizenship is required for access to this project. Valid driver's license is required. Must be able to work in a team atmosphere. Must put forward a professional behavior that enhances productivity and promotes teamwork and cooperation. Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others. Must take and pass a pre-employment drug, background check.

       

Compensation Details:

$70,000 - $90,000

       

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

 

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance

• Paid time off and holidays

• Retirement benefits (including 401(k) matching)

• Educational reimbursement

• Parental leave

• Employee stock purchase plan

• Tax-saving options

• Disability and life insurance

• Pet insurance

 

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

       

Original Posting:

05/04/2026 - 05/08/2026

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

       

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed,  marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.