Injection Mold Toolmaker & CNC Programming Specialist

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

Benefits offered by this job

Health coverage

HSA

401(k) match

Life insurance

Disability insurance

Paid holidays

Paid time off

EAP

Referral program

Job summary

Moldtronics, Inc. in Downers Grove, IL, is seeking an experienced moldmaker to own mold build and repair from CAD data and engineering drawings. You will operate CNC mills and EDMs, create CNC programs with Mastercam, and ensure parts meet tight tolerances.

The role requires 5+ years of hands-on mold experience, strong CAD/CAM skills, and the ability to work independently as well as with cross-functional teams. On-site, daytime hours with competitive hourly pay.

Qualifications

• 5+ years hands-on injection mold making and/or mold repair experience.
• Proven ability to build plastic injection molds from CAD data, blueprints and drawings.
• Deep knowledge of injection mold construction, operation, maintenance and repair.
• Fluency reading mold designs, blueprints, CAD models, tolerances, and engineering specs.
• Experience with mills, lathes, surface grinders, and standard Tool Room equipment.
• Exceptional precision machining, fitting, inspection and troubleshooting capability.
• Comfort working to close tolerances using precision measuring equipment.
• CNC experience required.
• CAD/CAM experience required.
• Ability to work independently and collaboratively.

Responsibilities

• Own the build and repair of plastic injection molds using CAD data, blueprints, and engineering instructions.
• Run advanced equipment: CNC mills, vertical mills, sinker/orbital EDMs, and surface grinders.
• Machine precision components to exacting specifications and finishes.
• Create, edit, and optimize your own CNC programs with Mastercam.
• Read and interpret technical drawings, CAD models, and GD&T with accuracy.
• Verify quality with precision measuring instruments and meticulous documentation.
• Partner with engineering/production to diagnose tooling and part-quality issues and implement corrective actions.
• Pitch in with related tasks as needed to meet team goals.
• Continuously refine mold designs and manufacturing processes for better throughput and reliability.

Skills

Mold making

Mold repair

Blueprint reading

GD&T

CNC machining

CAD/CAM

SolidWorks

Mastercam

Precision fitting

Troubleshooting

Independent work

Tools

Haas CNC

Okamoto Surface Grinder

Haas Lathe

Bridgeport

SolidWorks

Mastercam

Sinker EDM

Job description

A day on the floor It’s 7:00 AM in Downers Grove. You review the build plan, pull up a SolidWorks model, post fresh toolpaths in Mastercam, and set up a 3–4 axis Haas VMC. By mid‑morning, you’re fitting precision components for a new plastic injection mold, using the surface grinder for final finishes and the sinker EDM to burn a tight feature. After lunch, you’re collaborating with engineering to resolve a tolerance stack‑up, validating dimensions with precision gauges, and documenting improvements to boost repeatability for the next run.

About Moldtronics

Moldtronics, Inc. is a privately held contract manufacturer headquartered in Downers Grove, Illinois. Since 1955, we’ve delivered custom injection molding, mold making, CNC machining, and manufacturing solutions for aerospace, defense, medical, agriculture, IOT, and commercial customers.

The impact you’ll make

• Own the build and repair of plastic injection molds using CAD data, blueprints, and engineering instructions.
• Run advanced equipment: CNC mills, vertical mills, sinker/orbital EDMs, and surface grinders.
• Machine precision components to exacting specifications and finishes.
• Create, edit, and optimize your own CNC programs with Mastercam.
• Read and interpret technical drawings, CAD models, and GD&T with accuracy.
• Verify quality with precision measuring instruments and meticulous documentation.
• Partner with engineering/production to diagnose tooling and part‑quality issues and implement corrective actions.
• Pitch in with related tasks as needed to meet team goals.
• Continuously refine mold designs and manufacturing processes for better throughput and reliability.

What you bring

• 5+ years of hands‑on injection mold making and/or mold repair experience.
• Proven ability to build plastic injection molds from mold designs, CAD models, blueprints, and engineering drawings.
• Deep knowledge of injection mold construction, operation, maintenance, and repair.
• Fluency reading mold designs, blueprints, CAD models, tolerances, and engineering specifications.
• Experience with mills, lathes, surface grinders, and standard Tool Room equipment.
• Exceptional precision machining, fitting, inspection, and troubleshooting capability.
• Comfort working to close tolerances using precision measuring equipment.
• CNC experience required.
• CAD/CAM experience required.
• Ability to work independently and collaboratively.

Compensation & schedule

• $30.00–$45.00 per hour, commensurate with 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

Moldtronics Offers a Comprehensive Benefits Package, Including

• 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

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

Tools & technologies you’ll run

• 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

Moldtronics, Inc. is an Equal Opportunity Employer.