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Assistant Engineer Jobs in Decatur, IL (NOW HIRING)

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Ethanol Support Engineer - Decatur, IL

Decatur, IL

$90K - $144K/yr

Assist with ethanol plant support requests, including plant visits, troubleshooting plant problems ... engineering, or related disciplines).Industry Expertise: 10+ years of hands-on experience in ...

CEI Services

Project Engineer - High Voltage

Decatur, IL · On-site

$75K - $870K/yr

Overview William Charles Electric, a MasTec Company, is hiring a Project Engineer that will work with the project team to support all documentation as well as QA/QC activities required under the ...

MV Transportation

Administrative Assistant

Decatur, IL · On-site

$17.50 - $23.50/hr

The Administrative Assistant is responsible for accomplishing day to day administrative tasks in a fast-paced environment. Job Responsibilities: * MS Office platform and general knowledge of windows ...

MV Transportation

Administrative Assistant

Decatur, IL · On-site

$17.50 - $23.50/hr

The Administrative Assistant is responsible for accomplishing day to day administrative tasks in a fast-paced environment. Job Responsibilities: * MS Office platform and general knowledge of windows ...

MV Transportation

Administrative Assistant

Decatur, IL · On-site

$17.50 - $23.50/hr

The Administrative Assistant is responsible for accomplishing day to day administrative tasks in a fast-paced environment. Job Responsibilities: * MS Office platform and general knowledge of windows ...

AMS Ameren Services

Engineering Rep Step 1

Decatur, IL · On-site

Use training and company computer systems to initiate, engineer, and complete standard design customer requests, ensuring adequate electric, natural gas, and lighting service is provided. * Assist ...

Ameren Services

Engineering Rep Step 1

Decatur, IL · On-site

Use training and company computer systems to initiate, engineer, and complete standard design customer requests, ensuring adequate electric, natural gas, and lighting service is provided. * Assist ...

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All JobsAssistant Engineer JobsAssistant Engineer Jobs in Decatur, IL

Assistant Engineer information

See Decatur, IL salary details

$32K

$86.1K

$130.5K

How much do assistant engineer jobs pay per year?

As of Jun 25, 2026, the average yearly pay for assistant engineer in Decatur, IL is $86,089.00, according to ZipRecruiter salary data. Most workers in this role earn between $68,400.00 and $101,400.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as an Assistant Engineer, and why are they important?

To thrive as an Assistant Engineer, you need a solid grounding in engineering principles, analytical thinking, and a relevant bachelor's degree in engineering or a related field. Familiarity with technical tools such as CAD software, project management systems, and industry-specific standards or certifications (like EIT or FE) is often required. Strong problem-solving skills, teamwork, and effective communication help you collaborate on complex projects and interact with stakeholders. These skills and qualifications are essential for delivering accurate technical support, ensuring project efficiency, and contributing to successful engineering outcomes.

How does an Assistant Engineer typically collaborate with senior engineers and other team members on projects?

Assistant Engineers work closely with senior engineers, designers, and other technical staff by supporting project planning, conducting site visits, and preparing technical documentation. They often assist in problem-solving sessions and help implement design solutions under supervision. Regular communication and teamwork are essential, as Assistant Engineers frequently coordinate tasks, share updates, and seek feedback to ensure project objectives are met efficiently. This collaborative environment provides valuable learning opportunities and helps build a strong foundation for career advancement.

What Is an Assistant Engineer?

An assistant engineer works alongside a senior engineer throughout a project. The job is often used to gain work experience by recent college graduates at the beginning of their career. Your duties vary, depending on the type of engineering and industry you work in, but may include managing equipment, performing inspections, reviewing blueprints, and coordinating among departments. Typical qualifications for an assistant engineer position include at least an associate or bachelor’s degree in an engineering field, strong communication skills, and the ability to carefully follow directions.

What is the difference between Assistant Engineer vs Junior Engineer?

AspectAssistant EngineerJunior Engineer
Required CredentialsBachelor's degree in engineering or related field, often with some certificationsBachelor's degree in engineering, entry-level certification may be preferred
Work EnvironmentSupports senior engineers, involved in project planning and executionPerforms basic engineering tasks, supervised by senior staff
Employer & Industry UsageCommon in construction, manufacturing, civil, and mechanical sectorsUsed interchangeably in similar industries, often as entry-level role

Assistant Engineers typically have more responsibilities in supporting project management and planning, while Junior Engineers focus on executing specific technical tasks under supervision. Both roles require similar educational backgrounds, but Assistant Engineers often have additional certifications or experience. The roles are used across various engineering sectors and serve as stepping stones for career advancement.

What are Assistant Engineers?

Assistant Engineers are entry-level professionals who support senior engineers in the planning, design, development, and maintenance of projects across various engineering fields such as civil, mechanical, electrical, or software. Their responsibilities often include assisting with technical tasks, preparing reports, conducting research, and ensuring compliance with project specifications and safety standards. Assistant Engineers gain practical experience and skills under the supervision of more experienced engineers, which helps them advance in their engineering careers.
More about Assistant Engineer jobs
What are the most commonly searched types of Engineer jobs in Decatur, IL? The most popular types of Engineer jobs in Decatur, IL are:
What cities near Decatur, IL are hiring for Assistant Engineer jobs? Cities near Decatur, IL with the most Assistant Engineer job openings:
Assistant Engineer jobs near you
Infographic showing various Assistant Engineer job openings in Decatur, IL as of June 2026, with employment types broken down into 2% As Needed, 89% Full Time, 6% Part Time, and 3% Contract. Highlights an 88% Physical, 5% Hybrid, and 7% Remote job distribution, with an average salary of $86,089 per year, or $41.4 per hour.
Senior Design Engineer - Mechanical / Electrical

Senior Design Engineer - Mechanical / Electrical

Caterpillar

Decatur, IL • On-site

$100K - $135K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 7 days ago

Caterpillar Inc. rating

7.5

Company rating: 7.5 out of 10

Based on 460 frontline employees who took The Breakroom Quiz

220th of 419 rated machine equipment manufacturers

Job description

Career Area:
Engineering
Job Description:
Your Work Shapes the World at Caterpillar Inc.
When you join Caterpillar, you're joining a global team who cares not just about the work we do - but also about each other. We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here - we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it.
Senior Design Engineer - Mechanical / Electrical
Load & Haul Products | Caterpillar Resource Industries
Location: Decatur, IL - Mossville, IL (AC) (In office 5 days a week)
Travel: Up to 10%
Relocation Assistance: Available
Visa Sponsorship: Not Offered
Caterpillar Inc. is the world's leading manufacturer of construction and mining equipment. You will have the opportunity to join the Load and Haul Electrical Installation team, responsible for mechanically integrating electrical solutions across Large Wheel Loaders, Compactors, Wheel Tractor Scrapers, Underground Vehicles, and Articulated Trucks.
About the Role
As a Senior Design Engineer, you will lead electrical installation projects with a strong mechanical focus, ensuring electrical systems are effectively packaged, protected, and integrated within complex application environments. You'll work across the full product lifecycle-from early concept through production-collaborating closely with mechanical, electrical system, manufacturing, and supplier teams.
This role is ideal for Mechanical Engineers with experience in vehicle systems, structures, packaging, routing, and integration, as well as Electrical Engineers who enjoy working at the intersection of both disciplines.
Why This Role Stands Out
  • End-to-end ownership: Influence design decisions from concept through validation and production, including mechanical packaging and electrical integration tradeoffs.
  • True cross-functional collaboration: Work alongside mechanical design, electrical systems, manufacturing, suppliers, and purchasing to optimize performance, quality, durability, and cost.
  • Complex product systems: Apply your engineering expertise to large, highly integrated off-highway machines operating in demanding environments.
  • Growth & impact: Strengthen leadership skills while delivering high-value solutions to customers across diverse applications and platforms.

What You Will Do
  • Lead the mechanical design and integration of electrical systems within complex vehicle platforms, ensuring robust routing, protection, and packaging.
  • Design and develop components, brackets, harness routing paths, enclosures, and installation schemes that balance electrical performance with mechanical durability.
  • Own cost, quality, validation, and schedule for assigned projects.
  • Collaborate with suppliers to ensure manufacturability, serviceability, and lifecycle efficiency.
  • Partner with manufacturing teams to address assembly feasibility, tolerance stack-up, and installation repeatability.
  • Assist supply specialists and buyers with supplier development and performance improvement.
  • Drive collaboration across product development, value chain, manufacturing, commercial, and product support organizations.
  • Research and develop new technologies related to vehicle integration, packaging, thermal considerations, and durability.
  • Develop and document functional and installation design requirements, including mechanical constraints and environmental considerations.
  • Lead and participate in design reviews, ensuring conformance to electrical and mechanical design standards and best practices.
  • Organize, coordinate, and execute prototype builds, testing, and analysis, including fit, form, function, and durability assessments.

Top Candidates Will Have
  • Experience with Large Wheel Loaders, Wheel Tractor Scrapers, heavy equipment, or mining applications.
  • Background in mechanical engineering, electrical engineering, or integrated systems design.
  • Hands-on experience with vehicle systems integration, including routing, packaging, structural interfaces, and installation design.
  • Experience working within an SDP / gated development process and influencing outcomes through technical expertise.
  • Proven ability to lead multiple engineering projects from concept through production in a cross-functional environment.

Degree Requirement
  • Bachelor's degree (or higher) in Mechanical Engineering, Electrical Engineering, or a related accredited engineering discipline.

What Skills You Will Bring
  • Analytical Thinking: Ability to identify root causes and develop effective technical solutions across electrical and mechanical domains.
  • Effective Communication: Capability to clearly convey technical concepts across disciplines and organizational levels.
  • Managing Multiple Priorities: Proven ability to manage concurrent projects and make effective tradeoff decisions.
  • Technical Excellence: Strong understanding of mechanical and/or electrical systems and how they interact within complex products.
  • Computer-Aided Design & Engineering: Extensive experience with Creo, Vis View, and Teamcenter.
  • Product Design for Manufacturing: Knowledge of manufacturing processes, installation methods, and design-for-assembly principles.
  • Product Design & Development: Ability to design, develop, and deliver integrated systems from concept through production.

Why Mechanical Engineers Should Apply
This role is not limited to pure electrical designs. Success depends heavily on mechanical aptitude-how electrical content survives, fits, routes, mounts, and performs within large, high-duty-cycle machines. Mechanical Engineers with experience in vehicle integration, structures, packaging, and durability will thrive here.
Summary Pay Range:
$112,710.00 - $169,060.00
Compensation and benefits offered may vary depending on multiple individualized factors, job level, market location, job-related knowledge, skills, individual performance and experience. Please note that salary is only one component of total compensation at Caterpillar.
Benefits:
Subject to plan eligibility, terms, and guidelines. This is a summary list of benefits.
  • Medical, dental, and vision benefits*
  • Paid time off plan (Vacation, Holidays, Volunteer, etc.)*
  • 401(k) savings plans*
  • Health Savings Account (HSA)*
  • Flexible Spending Accounts (FSAs)*
  • Health Lifestyle Programs*
  • Employee Assistance Program*
  • Voluntary Benefits and Employee Discounts*
  • Career Development*
  • Incentive bonus*
  • Disability benefits
  • Life Insurance
  • Parental leave
  • Adoption benefits
  • Tuition Reimbursement

* These benefits also apply to part-time employees
This position requires working onsite five days a week.
Relocation is available for this position.
Visa Sponsorship is not available for this position.
Posting Dates:
June 18, 2026 - June 28, 2026
Any offer of employment is conditioned upon the successful completion of a drug screen.
Caterpillar is an Equal Opportunity Employer, Including Veterans and Individuals with Disabilities. Qualified applicants of any age are encouraged to apply.
Not ready to apply? Join our Talent Community.

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