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Weekend Prototype Build Engineer Jobs in Illinois

Senior Data Engineer

Westmont, IL · On-site

$106K - $144K/yr

In doing so, we will build a better tomorrow for our clients, our people, and our communities. The ... You will be expected to go from concept to working prototype in days, not months, while maintaining ...

Principal Innovation Engineer

Chicago, IL · On-site

$102K - $208K/yr

Architect and build end-to-end prototypes and reusable assets, including AI-enabled applications ... Establish and evolve engineering standards for innovation delivery (reference architectures ...

Principal Innovation Engineer

Rosemont, IL · On-site

$102K - $208K/yr

Architect and build end-to-end prototypes and reusable assets, including AI-enabled applications ... Establish and evolve engineering standards for innovation delivery (reference architectures ...

Architect and build end-to-end prototypes and reusable assets, including AI-enabled applications ... Establish and evolve engineering standards for innovation delivery (reference architectures ...

You will be expected to go from concept to working prototype in days, not months, while maintaining ... Design, build, and deploy AI agents and multi-agent systems that automate complex workflows end-to ...

Senior R&D Engineer

North Barrington, IL · On-site

$110 - $150/hr

Build and evaluate prototypes in a laboratory environment * Develop innovative solutions across ... Mentor and guide engineers and technical team members throughout project execution * Drive ...

Mechanical Engineer

Decatur, IL · On-site

$65K - $95K/yr

Participate in the design, development, build, and validation of mechanical systems and components ... Support prototype, pilot, and production builds while working closely with manufacturing and ...

You will be expected to go from concept to working prototype in days, not months, while maintaining ... Design, build, and deploy AI agents and multi-agent systems that automate complex workflows end-to ...

Design, build, and deploy AI agents that automate end-to-end workflows, moving beyond demo use ... Partnering closely with engineers in delivery * Experience building prototypes, rapid iterations ...

Design, build, and deploy AI agents that automate end-to-end workflows, moving beyond demo use ... Partnering closely with engineers in delivery * Experience building prototypes, rapid iterations ...

Build physical prototypes and samples for customer presentations and internal testing * Support ... Bachelor's degree in Packaging Engineering, Packaging Science, Mechanical Engineering, Industrial ...

Showing results 41-60

Weekend Prototype Build Engineer information

What are the most commonly searched types of Prototype Build Engineer jobs in Illinois?

The most popular types of Prototype Build Engineer jobs in Illinois are:

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Cities in Illinois with the most Weekend Prototype Build Engineer job openings:

Infographic showing various Weekend Prototype Build Engineer job openings in Illinois as of June 2026, with employment types broken down into 1% As Needed, 63% Full Time, 26% Part Time, 8% Contract, and 2% Nights. Highlights an 82% Physical, 2% Hybrid, and 16% Remote job distribution.

Project Engineer - Plastic Injection Molding

Sterling Engineering Inc.

South Elgin, IL

$100K - $135K/yr

Full-time

Medical, Retirement, PTO

Posted 17 hours ago

Posted today


Job description

Title: Project Engineer - Plastic Injection Molding
Location: South Elgin, IL
Pay Rate: $100,000-135,000 + bonus structure
Hire Type: Direct Hire
Comprehensive Benefits Package including:
Blue Cross Blue Shield PPO
Matching 401k up to 6% with Safe Harbor
Several paid company days off in addition to paid holidays and PTO
Yearly compensation increases

This is a hands-on opportunity for an engineer with plastics and injection molding experience who enjoys solving complex design challenges, coordinating multiple stakeholders, and seeing projects move from concept to finished production. You’ll have significant exposure to tooling design, mold development, prototyping, customer engineering, material selection, and manufacturing process improvement, with opportunities to work on both domestic and international projects.

Key Responsibilities
  • Lead new program development from initial quotation through production.
  • Serve as a primary engineering contact for customers and tooling suppliers.
  • Analyze customer prints and tooling quotation requests and prepare tooling quotations.
  • Procure tooling and coordinate the design and build process.
  • Ensure new tooling is designed and built to support robust, reliable manufacturing processes.
  • Conduct design reviews and preliminary tool reviews with cross-functional teams.
  • Place tooling purchase orders and monitor supplier progress, quality, timing, and compliance with agreed designs.
  • Conduct pre-sampling and post-sampling meetings with project teams.
  • Partner with Sales on technical design projects, including prototyping and design recommendations.
  • Support metal-to-plastic conversion projects and identify opportunities created through product design changes.
  • Develop piece-part designs and identify qualified sources for design, tooling, and prototyping activities.
  • Perform mold simulation analysis using Moldex3D.
Qualifications
  • Must have a Bachelor’s degree in Engineering, Plastics Technology, or a related field or equivalent professional experience.
  • Must have at least 3–5 years of plastic injection molding experience.
  • Strong computer skills, including CAD—preferably SolidWorks but open to other design software
  • Broad understanding of plastic materials, including PP, ABS, Acetal, and Nylon.
  • Ability to manage projects, coordinate with multiple stakeholders, and follow through on deadlines.
  • Willingness and ability to travel a couple of times a year domestically and internationally when required (Italy, Mexico, China).
Qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.