Mechanical Maintenance Technician III

Amentum; Decatur (IL); On-site; USD 39,000 - 48,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Paid time off

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking an Industrial Maintenance Technician III to join our Decatur manufacturing team. You will perform high-level troubleshooting, execute preventive maintenance, and mentor junior technicians while supporting a 24/7 operation with potential weekend shifts.

Responsibilities include troubleshooting electrical and control systems, leading PM schedules for motors, conveyors, and HVAC/R equipment, and interpreting schematics for upgrades.

Qualifications

• High school diploma or GED.
• Reading, math and basic tools competency.
• Available to work any shift and overtime as needed.
• Must be 18 years or older.
• May require valid driver’s license.

Responsibilities

• Advanced Troubleshooting: complex root-cause analysis on electrical systems and automated equipment.
• Preventive & Predictive Maintenance: lead PM schedules for motors, pumps, conveyors, HVAC/R etc.
• Technical Leadership: mentor Level 1/2 technicians and provide on-the-job guidance.
• Schematics & Documentation: interpret blueprints and electrical schematics for upgrades.

Skills

Troubleshooting

Electrical systems

Automation

Mechanical systems

Reading blueprints

Mentoring

Education

High school diploma or GED

Tools

P&IDs

Electrical schematics

Motor control circuits

VFDs

Job description

Amentum is seeking an Industrial Maintenance Technician 3 to join our manufacturing team in Decatur, III

Typical work schedule is on 2nd shift; hours may vary based on business demand.

Weekend hours may be scheduled to support our 24/7 operation

The Industrial Maintenance Technician III performs high-level troubleshooting, complex repairs, and comprehensive preventive maintenance on a wide variety of advanced facility and process-related equipment. Operating with high autonomy, the Tech III ensures maximum equipment uptime and system reliability while mentoring junior technicians.

Responsibilities:

Advanced Troubleshooting: Perform complex root-cause analysis and repairs on industrial electrical systems, electrical control systems, and automated equipment.

Preventive & Predictive Maintenance: Lead and execute PM schedules for critical facility assets, including motors, pumps, valves, conveyors, piping networks, overhead doors, and facility lighting, as well as HVAC/R systems if applicable.

Technical Leadership: Act as a subject matter expert, providing guidance, on-the-job training, and job-shadowing opportunities to Level 1 and Level 2 technicians.

Schematics & Documentation: Interpret advanced blueprints, P&IDs, and electrical schematics to safely modify or upgrade existing systems.

Minimum Requirements:

High school diploma or GED

Meet the requirements for reading, math, and basic tools competency.

Be available to work any shift/hours during the work week

Must be willing to work overtime when required.

Be at least 18 years or older.

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

Physical Requirements:

Requires the ability to regularly lift up to 50 lbs.

Requires the ability to regularly climb extension ladders, roof ladder, stepladders, and stairs at least 10 times during shift.

Requires the ability and flexibility to bend/stoop, squat, move in a 90-degree fashion, stretch/reach repetitively throughout shift.

Requires the ability to walk extensively throughout the plant during shift.

Requires the use of a Company/Client approved utility knife.

Requires the ability to differentiate colors pertaining to wire color-coding.

Some tasks will require repetitive wrist movement.

Requires the ability to interact with all clients in a professional and friendly manner despite periods of stress.

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.

Preferred Qualifications:

Experience: 3 to 7 years of industrial maintenance experience specializing in electrical controls, automation, and heavy mechanical systems.

Technical Expertise: Proven proficiency in 480V 3-phase systems , motor control circuits, variable frequency drives (VFDs), and fluid power (pneumatics/hydraulics).

Compensation Details:

25-34

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.

Compensation Details:

$28- $35

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:

10/21/2026 - 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 (https://postings.govdocs.com/#/vxSkbztPuAwwxfs) .