Precision Injection Mold Toolmaker (CNC/EDM)

Moldtronics, Inc.; Downers Grove (IL); On-site; USD 41,000 - 62,000; Full time

Benefits offered by this job

Medical, dental, vision coverage

Health Savings Account (HSA)

401(k) with company match

Life insurance

Disability insurance

Paid holidays

Paid time off

Employee Assistance Program

Job summary

Moldtronics, Inc. in Downers Grove, IL, is seeking an experienced Moldmaker responsible for building and repairing plastic injection molds from CAD models and blueprints.

You will operate Haas CNC mills, EDMs, and surface grinders, ensuring tight tolerances and high-quality molds. Responsibilities include creating Mastercam programs, interpreting engineering drawings, and collaborating with engineering and QA to troubleshoot issues and drive continuous improvement.

Qualifications

• 5+ years of injection mold making and/or mold repair experience.
• Ability to read and interpret mold designs, blueprints, CAD models, tolerances, and engineering specifications.
• Experience with mills, lathes, surface grinders, and standard Tool Room equipment.
• CNC and CAD/CAM experience required.

Responsibilities

• Build and repair plastic injection molds from CAD models, blueprints, and engineering specifications.
• Operate CNC mills, vertical mills, sinker/orbital EDM machines, and surface grinders.
• CNC machine precision parts and components to specification.
• Create programs using Mastercam and read technical drawings with accuracy.
• Perform quality inspections using precision measuring equipment.
• Troubleshoot tooling and part-quality issues with engineering and production teams.
• Contribute to continuous improvement of mold design and manufacturing processes.

Skills

Mold making

CNC machining

Blueprint reading

CAD/CAM proficiency

Tool fitting and assembly

Quality inspection

Close-tolerance machining

Mold design knowledge

Tools

Solidworks

Mastercam

Haas machines

Okamoto surface grinder

Job description

Join a Team That Builds What Others Imagine

At Moldtronics, Inc.—a privately held contract manufacturer in Downers Grove, Illinois—we’ve been crafting high‑precision solutions since 1955. Our customers span aerospace, defense, medical, agriculture, IoT, and commercial markets, and they rely on us for custom injection molding, mold making, CNC machining, and end‑to‑end manufacturing.

Day in the Life

You’ll start your morning reviewing CAD models and blueprints alongside engineering. By mid‑day, you’re at the controls of Haas CNC mills or on the sinker/orbital EDM, machining precision components that bring a new plastic injection mold to life. In the afternoon, you’re inspecting tight‑tolerance work, fitting and assembling tooling, and collaborating with production and quality to troubleshoot part performance. You’ll wrap up by refining a Mastercam program and noting a design tweak that will make the next build even better.

What You’ll Do

• Build and repair plastic injection molds from CAD models, blueprints, and engineering specifications
• Operate CNC mills, vertical mills, sinker/orbital EDM machines, and surface grinders
• CNC machine precision parts and components to specification
• Create your own programs using Mastercam
• Read and interpret blueprints, CAD models, and technical drawings with accuracy
• Perform quality inspections using precision measuring equipment
• Troubleshoot tooling and part-quality issues in collaboration with engineering and production teams
• Assist with other related duties as required or assigned
• Contribute to continuous improvement of mold design and manufacturing processes

What You Bring

• 5+ years of injection mold making and/or mold repair experience
• The ability to build plastic injection molds using mold designs, CAD models, blueprints, and engineering drawings
• Strong knowledge of injection mold construction, operation, maintenance, and repair
• Ability to read and interpret mold designs, blueprints, CAD models, tolerances, and engineering specifications
• Experience with mills, lathes, surface grinders, and standard Tool Room equipment
• Strong precision machining, fitting, inspection, and troubleshooting skills
• Experience working to close tolerances using precision measuring equipment
• CNC experience required
• CAD/CAM experience required
• Ability to work independently or with a team

Compensation & Schedule

$30.00–$45.00 per hour, depending on experience and skills.

• Full-time
• Monday–Friday
• 7:00 AM–4:00 PM
• On‑site in Downers Grove, Illinois
• Overtime may be available based on production needs

Benefits

• Medical, dental, vision, and prescription drug coverage
• Health Savings Account (HSA)
• 401(k) with company match
• Company‑paid basic life insurance
• Disability insurance
• 10 Paid holidays
• Paid time off
• Employee Assistance Program (EAP)
• Employee referral program

Core Proficiencies

• Mechanical Troubleshooting Skills
• Manual Machining Skills
• Tool/Die/Mold Repair Skills
• Injection Molding Experience
• Blueprint Reading
• Close‑Tolerance Machining
• CNC Machining
• EDM Machining
• Injection Mold Design
• Injection Mold Making / Mold Making
• Mold Building / Mold Construction
• Mold Fitting & Assembly
• Mold Troubleshooting

Equipment & Technologies

• CNC Mill (3-4 axis VMC) (Haas)
• Surface Grinder (Okamoto)
• CNC Lathe (2-4 axis) (Haas)
• Manual Vertical Mill (Bridgeport)
• CAD Software (Solidworks)
• CAM Software (Mastercam)
• CNC Lathe (2–4 Axis)
• EDM – Sinker EDM

Equal Opportunity

Moldtronics, Inc. is an Equal Opportunity Employer.