Engineering Intern Fall Semester 2026

Mechanical Engineering Intern

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 Mechanical Engineering Intern to support our Spent Fuel Handling Project.

We are looking for a Mechanical Engineering Intern to support the team to execute the design.  This role will work with engineers and designers from Idaho Falls and other Amentum offices to complete technical portions of projects. Typical duties include researching and preparing responses to RFI’s and Submittals from the contractors. 

Qualifications – External

• Pursuing an Engineering.degree
• Mechanical design experience (preferred) and knowledge of engineering principles.
• Excellent problem solving and communication skills.
• Self-starter and motivated to accomplish tasks.
• Ability to follow established Amentum quality procedures and ensure that all work accomplished under their control is completed under established quality procedures.
• Competent using Microsoft Office software.
• Ability to work onsite at Idaho National Lab daily if needed.
• US citizenship required.

Internship Benefits:

• Gain hands on experience in a dynamic and challenging environment.
• Work on projects with a talented group of engineers.
• Develop your mechanical engineering skills.
• Contribute to building a high-profile project.

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.  Hand manipulation is required for simple grasping, pushing and pulling, and fine manipulation. Occasional need to reach and/or work above the shoulder, for supplies, as well as below the shoulder for same. Must be alert to equipment in the field, there will be occasional travel, will 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. 

Equipment and Machines:

• Standard office PC with software will be provided 
• Attendance: Ability to work in the Idaho Falls and Construction Site at INL is required
• Valid driver's license is required.
• Must be able to work in a team atmosphere. 
• Must put forward 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 and background check.

Compensation Details:

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:

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.