Injection Mold Toolmaker & CNC Programming Specialist

Moldtronics Mold & Machining; Downers Grove (IL); On-site; USD 41,000 - 62,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

HSA

401(k) with company match

Life insurance

Disability insurance

Paid holidays and PTO

Employee assistance program

Job summary

Moldtronics, Inc. in Downers Grove, IL seeks a skilled mold maker to own the build and repair of plastic injection molds from CAD data and blueprints.

You’ll read engineering instructions, set up tools, and ensure precision finishes using CNC mills, EDMs, and surface grinders. Join a team that collaborates with engineering to solve tolerance stack-ups, verify dimensions with precision gauges, and document improvements to boost throughput and repeatability for the next run.

Qualifications

• 5+ years of hands-on injection mold making and/or mold repair experience.
• Fluency reading mold designs, blueprints, CAD models, tolerances, and engineering specifications.
• Experience with mills, lathes, surface grinders, and standard Tool Room equipment.

Responsibilities

• Own the build and repair of plastic injection molds using CAD data, blueprints, and engineering instructions.
• Run advanced equipment: CNC mills, EDMs, surface grinders, and mold-related machinery.
• Create, edit, and optimize CNC programs with Mastercam.
• Read and interpret drawings, CAD models, and GD&T with accuracy.
• Diagnose tooling and part-quality issues with engineering/production and implement corrective actions.
• Document improvements to boost repeatability and throughput for future runs.

Skills

Mold making

Precision machining

CAD/CAM

GD&T reading

Collaboration

Independent work

Troubleshooting

Tools

SolidWorks

Mastercam

Haas VMC

Okamoto Surface Grinder

Sinker EDM

Bridgeport Milling

CNC Lathe

Job description

A day on the floorIt’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 MoldtronicsMoldtronics, 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 makeOwn 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 bring5+ 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-timeMonday–Friday7:00 AM–4:00 PMOn-site in Downers Grove, IllinoisOvertime may be available based on production needs.BenefitsMoldtronics offers a comprehensive benefits package, including:Medical, dental, vision, and prescription drug coverageHealth Savings Account (HSA)401(k) with company matchCompany-paid basic life insuranceDisability insurance10 Paid holidaysPaid time offEmployee Assistance Program (EAP)Employee referral programProficienciesMechanical Troubleshooting SkillsManual Machining SkillsTool/Die/Mold Repair SkillsInjection Molding ExperienceBlueprint ReadingClose-Tolerance MachiningCNC MachiningEDM MachiningInjection Mold DesignInjection Mold Making / Mold MakingMold Building / Mold ConstructionMold Fitting & AssemblyMold TroubleshootingTools & technologies you’ll runCNC 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 EDMMoldtronics, Inc. is an Equal Opportunity Employer.