Engineer II

Amentum; Decatur (IL); On-site; USD 85,000 - 100,000; Full time

Job summary

Amentum is seeking a 1st shift Engineer II for our facility operations team in Decatur, IL. The role focuses on designing, fabricating, modifying and evaluating mechanical and electro-mechanical components and systems to support ongoing operations.

You will coordinate design efforts, produce specifications, and contribute to project planning and technical investigations. A high school diploma with several years of relevant experience or a mechanical engineering degree is expected, with potential

Qualifications

• High school diploma or demonstrated equivalent.
• 4+ years of relevant experience with associate's degree; 0-2 years with Mechanical Engineering Bachelor's degree, and/or combination of experience and education.

Responsibilities

• Designs, fabricates, modifies and evaluates mechanical and electro-mechanical components, sub-systems and systems.
• Prepares design specifications, analyses and recommendations for presentation and approval.
• Plans, organizes and conducts technical projects involving design and development of products and processes.
• Investigates solutions to product and process problems.
• Coordinates drafters, engineers, and shop personnel on projects.
• Conducts independent technical investigations involving material and process specifications.

Skills

Mechanical design

Project coordination

Technical investigations

Drafting coordination

Education

Associate's degree

Mechanical Engineering Bachelor's degree

Job description

Amentum is seeking a 1st shift Engineer II for our facility operations team in Decatur, IL.

• Typical work schedule is Monday - Friday 8:00am -4:30 pm, hours may vary based on business demand.
• Additional hours may be scheduled to support our 24/7 operation.

Responsibilities:

Designs, fabricates, modifies and evaluates complicated and difficult mechanical and electro-mechanical components, sub-systems and systems. Prepares design specifications, analyses and recommendations for presentation and approval. Has technical responsibility for planning, organizing and conducting technical projects or phases of projects involving design and development of new or improved product and/or processes. Investigates solutions to product and/or process problems. Consolidates results of mechanical design elements for assigned projects. Coordinates the efforts of drafters/designers, engineering technicians, and machine shop personnel as required by assigned projects. Conducts independent technical investigations involving the origination or modification of material, component or process specifications and requirements.

Additional Information:

• Qualified applicants who are offered a position must pass a pre-employment substance abuse test.
• This position may require a valid Driver's License.
• This position does not include sponsorship for United States work authorization.
• This position will require the ability to obtain a security access badge at our client's location.
• This position may require various shifts, weekends, and alternative work schedules.
  

Special Requirements:

• Wear steel toe safety shoes, safety glasses, gloves, hard hats and other Personal Protective Equipment as needed.
• Cope with demands (stressors) that are associated with the job and/or the work environment so that acceptable levels of performance and overall contribution are maintained.

Minimum Requirements:

• High school diploma or demonstrated equivalent.
• 4+ years of relevant experience with associate's degree; 0-2 years of relevant experience with Mechanical Engineering Bachelor's degree, and or combination of experience and education.

Compensation Details:

$85,000 - 100,000

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:

10/28/2026 - Until Filled

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.