JobsMechanical EngineerUnited StatesSenior Mechanical Engineer III

Bonnell Industries Inc

Posted yesterday

Senior Mechanical Engineer III

Bonnell Industries Inc · Dixon, Illinois, United States

Full-timeOn site10+ yrs$80k–$90kListed as no visa sponsorshipMachinery Manufacturing
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In short

The Senior Mechanical Engineer III manages complex R&D projects from concept through production, including design, prototyping, and structural calculations. They also provide technical leadership, mentor junior engineers, and ensure equipment compliance with industry safety standards.

What they're looking for

MUST-HAVE SKILLS

Bachelor's degree6-8+ years experienceComplex R&D project managementStructural and hydraulic calculationsSolidWorksMetal fabrication processesSafety standards compliance

ALSO MENTIONED

Hydraulic and hydrostatic systemsWiring harness and schematic designTruck chassis layout and design

Candidates must have a bachelor's degree in mechanical engineering or a related field and 6-8+ years of relevant experience. Expert-level proficiency in 3D CAD software and extensive knowledge of metal fabrication and hydraulic systems are required.

About the employer

Bonnell Industries, Inc. Truck and Road Equipment

Built to your satisfaction. · hiring as Bonnell Industries Inc

We are a manufacturer, installer, and distributor of all things truck equipment. Our business is over 60 years old and is in its 3rd generation of family ownership. Our manufactured line deals with heavy truck equipment for snow & ice control, road maintenance, and leaf collection. These products are heavily designed towards the municipal customer. The other half of our business is geared toward contractors and small business that have truck equipment needs in professions such as utility repair, auto mechanic, and construction. We employ a few dozen shop staff for these processes. Additionally, we employ a sales team and a team of office personnel to handle in-house accounting, HR, inventory, purchasing, and marketing for the company.

Read more

Bonnell...Demanded by those who know quality.

INDUSTRY
Machinery Manufacturing
COMPANY
Privately Held
FOUNDED
1960
HEADQUARTERS
Dixon, IL
SIZE
51-200on LinkedIn
OFFICES
1 on LinkedIn

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Questions about this role

Is this Bonnell Industries Inc role remote?
Tagged on site.
What does it pay?
The posting lists $80,000–$90,000 a year.
Does it sponsor visas?
Listed as no visa sponsorship.
What experience does it ask for?
Listed as 10+ years.

The posting, in full

Description Under the direction of the Engineering Manager, the Senior Mechanical Engineer III is responsible for carrying out the duties of the Engineering department, including project management, calculations, design, research, prototyping, customer feedback, engineering documentation, estimating and mentoring. Primary focus will be on New Product Development and large-scale product redesign.

▶ READ THE FULL POSTING

Description

Under the direction of the Engineering Manager, the Senior Mechanical Engineer III is responsible for carrying out the duties of the Engineering department, including project management, calculations, design, research, prototyping, customer feedback, engineering documentation, estimating and mentoring. Primary focus will be on New Product Development and large-scale product redesign.

Essential Functions

Technical owner of Division 1----Snow & Ice Equipment, Truck Equipment

  • Focuses on system design, scalability, and long-term maintainability, handling Bonnell’s most ambiguous and high-risk projects.
  • Project Management: Complex R&D Projects from concept through prototype, to production.
  • Develop, test and validation programs for R&D projects.
  • Conduct safety reviews to ensure products comply with all known industrial safety standards.
  • Interaction with customers: troubleshooting, product feedback, R&D project testing.
  • Structural and Hydraulic Calculations for new product development.
  • Wiring Harness and Schematic Design.
  • Equipment and systems compliance with industry regulations, with particular attention to chassis GVW and CG requirements.
  • Integrate new and evolving technologies into prototype and production equipment.
  • Mentorship: Review the work of Level I and II engineers and help them grow.

Full Time Benefits

  • 401K with Company Match
  • Profit Sharing
  • Dental, Vision, Medical Insurance
  • Health Savings Account with Company Match
  • Company Provided Life Insurance
  • Company Provided Short Term Disability
  • Company Provided Long Term Disability
  • Referral Program
  • Tuition Reimbursement
  • Paid Time Off
  • Paid Training
  • Paid Holidays
  • Opportunities for Advancement
  • Apparel Allowance
  • Safety Boot Allowance
  • Prescription Safety Glass Allowance

Requirements

Supervisory Responsibility

Mentorship of junior team members, providing project guidance and small task assignment.

Work Environment

This job is operated in a professional office environment with frequent visits to the production floor. This role routinely uses standard office equipment such as computers, phones, photocopiers, printers, filing cabinets. Knowledgeable use of common measuring devices such as tape measures, calipers, squares, and protractors will be used routinely.

Position Type/Expected Hours of Work

This is a full-time position. Evening and weekend work may be required as job duties demand.

Preferred Education and Experience

  • Bachelor’s degree in industrial design, mechanical engineering or related field
  • 6-8+ years’ experience in industrial design, mechanical engineering or related field.
  • Ability to plan, schedule, coordinate and solve problems effectively.
  • Expert-level proficiency of SolidWorks or other 3D CAD software, including use of FEA, wire and hose routing, schematics, and PDM.
  • Experience in a production environment.
  • Extensive knowledge of metal fabrication processes, including material selection, sheet metal, welding, fixturing, finishing and assembly.
  • Working knowledge of machine assembly, linkage design, etc.
  • Hydraulic & hydrostatic systems.
  • Power transmission and drive line systems.
  • 12V Electrical systems, CAN bus, programming logic.
  • Regulatory experience - OSHA, DOT, NHTSA, CFR.
  • Liquid handling systems knowledge.
  • Truck chassis layout and design.
  • Ergonomics/operator environment design.

Travel

Travel is primarily local during the business day, although some out of the area and overnight travel may be expected. All travel must be approved in advance by management. Please refer to the employee handbook for all applicable policies.

Physical Demands

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

While performing the duties of this job, the employee is regularly required to talk or hear. The employee frequently is required to stand; walk; use hands to grip, handle or feel; and reach with hands and arms. The employee may occasionally lift up to 40 pounds.

Additional Eligibility Qualifications

None.

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This listing comes from Bonnell Industries Inc's own careers site. Apply links go to the employer. Company facts are from Bonnell Industries, Inc. Truck and Road Equipment's public profile. Last checked 13 Nov 2026.