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Molding Engineer Jobs in Riverside, CA (NOW HIRING)

Ezonyx Bio Technologies

Injection Mold Maker

Brea, CA · On-site

Programming, set-up and operation CNC milling machines, CNC WEDM machines (Charmilles and Sodick ... from molding department * Repair molds based on feedback from molding department * Conduct ...

Kirkhill Inc.

Project Engineer

Brea, CA · On-site

$110K - $140K/yr

Summary:The Project Engineer is responsible for leading the development, launch, and ongoing ... Support mold trials, process optimization, and production qualification activities.Provide ...

Kirkhill Inc.

Project Engineer

Brea, CA · On-site

The Project Engineer is responsible for leading the development, launch, and ongoing support of ... Support mold trials, process optimization, and production qualification activities. * Provide ...

Kirkhill Inc.

Project Engineer

Brea, CA · On-site

$110K - $140K/yr

The Project Engineer is responsible for leading the development, launch, and ongoing support of ... Support mold trials, process optimization, and production qualification activities. * Provide ...

EssilorLuxottica

Mold Tech III

Foothill Ranch, CA · On-site

$20.75 - $26.75/hr

Works with Mold Design Engineers and Mold Tool Room Supervisor as needed to develop a constructive efficient relationship. * Solves problems relating to unusual material, work-holding arrangements ...

Essilor

Mold Tech III

Foothill Ranch, CA · On-site

$20.75 - $26.75/hr

Works with Mold Design Engineers and Mold Tool Room Supervisor as needed to develop a constructive efficient relationship. * Solves problems relating to unusual material, work-holding arrangements ...

EssilorLuxottica Group

Mold Tech III

Foothill Ranch, CA · On-site

$20.75 - $26.75/hr

Works with Mold Design Engineers and Mold Tool Room Supervisor as needed to develop a constructive efficient relationship. * Solves problems relating to unusual material, work-holding arrangements ...

Applied Medical

Mold Polisher

Rancho Santa Margarita, CA · On-site

$20 - $30/hr

The mold polisher works closely with tooling, engineering, and quality teams to ensure molds meet exact specifications and regulatory standards. Key Responsibilities * Polish mold components in ...

Applied Medical

Mold Polisher

Rancho Santa Margarita, CA · On-site

$20 - $30/hr

The mold polisher works closely with tooling, engineering, and quality teams to ensure molds meet exact specifications and regulatory standards. Key Responsibilities * Polish mold components in ...

Partners Personnel

Plastics Process Engineer

Beaumont, CA · On-site

$77K - $80K/yr

Process Engineer - Plastic Injection Molding (Direct Hire) Location: Beaumont, CA Job Type: Full-time | Direct Hire 3PM-11PM Job Summary We are seeking a Process Engineer (Direct Hire) to support and ...

Balda C Brewer

Principal Quality Engineer

Ontario, CA · On-site

$120K - $150K/yr

Act as the primary quality engineering authority on complex, multi-component assembly projects involving multiple injection molded components, ensuring robust design transfer, validation, and ...

Collectorsuniverse

Tooling Engineer I

Santa Ana, CA

$72K - $87K/yr

As the Sustainment Engineer, you will be responsible for working with our molders to maintain our fleet of injection molding tool sets . You will support supplier quality to perform root cause ...

Essilor

Oakley - Mold Tech II

Foothill Ranch, CA · On-site

$28.81 - $42.53/hr

Work with Process Engineers to trouble shoot issues with tool or improve on. * Ability to work on ... Injection Molding process Experience * Toolmaker/Mold Maker Journeyman certification preferred

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Showing results 41-60

All JobsMolding Engineer JobsMolding Engineer Jobs in Riverside, CA

Molding Engineer information

See Riverside, CA salary details

$43.8K

$86.2K

$130.9K

How much do molding engineer jobs pay per year?

As of Aug 12, 2026, the average yearly pay for molding engineer in Riverside, CA is $86,243.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,600.00 and $91,300.00 per year, depending on experience, location, and employer.

Is mold making a good career?

A molding engineer plays a key role in designing and developing molds for manufacturing processes, often requiring technical skills in CAD software and knowledge of materials. The field offers steady employment opportunities in industries such as automotive, consumer goods, and aerospace, with potential for career advancement and specialization. Job stability and growth depend on industry demand and technical expertise.

What is the difference between Molding Engineer vs Tooling Engineer?

AspectMolding EngineerTooling Engineer
Primary FocusDesign, develop, and optimize molding processes for manufacturing plastic or metal partsDesign, develop, and maintain tools and dies used in manufacturing processes
Required SkillsKnowledge of molding machines, materials, process parametersExpertise in tool design, CAD/CAM, and machining
Work EnvironmentManufacturing plants, quality labsTool rooms, machine shops, manufacturing facilities
Common CertificationsManufacturing or process engineering certificationsTool design, CAD/CAM certifications

While both roles are integral to manufacturing, Molding Engineers focus on the overall molding process and product quality, whereas Tooling Engineers specialize in designing and maintaining the tools used in production. Both roles require technical skills and often collaborate to ensure efficient manufacturing operations.

What are the key skills and qualifications needed to thrive as a molding engineer?

To thrive as a Molding Engineer, you need a strong background in mechanical or manufacturing engineering, with expertise in injection molding processes and materials science, often supported by a relevant engineering degree. Familiarity with CAD software, mold flow analysis tools, and quality control systems is typically required, along with certifications like Six Sigma or RJG Master Molder. Problem-solving, attention to detail, and effective communication are crucial soft skills for collaborating with cross-functional teams and ensuring process optimization. These skills and qualifications are vital for producing high-quality molded products efficiently and maintaining consistent manufacturing standards.

What are some common challenges a molding engineer faces when optimizing production processes?

Molding Engineers often encounter challenges such as maintaining consistent quality across large production runs, minimizing cycle times, and troubleshooting defects like warping or sink marks. They must also balance material costs with performance requirements and adapt to changes in tooling or equipment. Effective collaboration with production teams, tool designers, and quality assurance is essential to identify root causes and implement solutions quickly, ensuring smooth and efficient operations.

What is a molding engineer?

Molding Engineers are specialized professionals who design, develop, and optimize molding processes used to manufacture parts and products, typically from plastics or other moldable materials. They work with various molding techniques, such as injection molding, compression molding, and blow molding, to ensure quality, efficiency, and cost-effectiveness in production. Their responsibilities include selecting appropriate materials, designing molds, troubleshooting defects, and improving existing processes. Molding Engineers often collaborate with product designers, quality engineers, and production teams to meet manufacturing goals.
What are popular job titles related to Molding Engineer jobs in Riverside, CA? For Molding Engineer jobs in Riverside, CA, the most frequently searched job titles are:
What job categories do people searching Molding Engineer jobs in Riverside, CA look for? The top searched job categories for Molding Engineer jobs in Riverside, CA are:
What cities near Riverside, CA are hiring for Molding Engineer jobs? Cities near Riverside, CA with the most Molding Engineer job openings:
Molding Engineer jobs near you
Infographic showing various Molding Engineer job openings in Riverside, CA as of August 2026, with employment types broken down into 91% Full Time, 3% Part Time, and 6% Nights. Highlights an 88% In-person, 3% Hybrid, and 9% Remote job distribution, with an average salary of $86,243 per year, or $41.5 per hour.

Injection Mold Maker

Ezonyx Bio Technologies

Brea, CA • On-site

Full-time

Re-posted 13 days ago

Job description

Company Description
EZONYX BIO TECHNOLOGIES, INC.™ IS A FULL-SERVICE BIOPLASTICS COMPANY THAT SPECIALIZES IN SUSTAINABLE PRODUCT INNOVATION AND THE MANUFACTURING OF PROPRIETARY BIOPOLYMER RESINS, PROVIDING COMPREHENSIVE DESIGN AND DEVELOPMENT SOLUTIONS FOR COMPANIES SEEKING ALTERNATIVES TO CONVENTIONAL PLASTICS.
Job Description
Plastic Injection Mold Maker (Los Angeles)
EZONYX BIO TECHNOLOGIES, Inc
We are a dynamic technology start-up currently developing more than 100 innovative products and inventions with multiple utility patents field with USPTO.
We are seeking an experienced plastic injection mold maker to join our engineering team in the research, development, optimization and launch of biodegradable and compostable plastics. This candidate will focus on mechanical and technical improvements for plastic extrusion, molding and other thermoforming processes to meet company goals.
Responsible for laying-out, building, fine-tuning and repairing injection molds.
Essential Duties and Responsibilities:
  • Competent, safe operation of manual milling machines and lathes
  • Programming, set-up and operation CNC milling machines, CNC WEDM machines (Charmilles and Sodick), CNC Die sinking EDM machines, Manual EDM machines, saws, surface grinders
  • 3 axis and 5 axis CNC operation
  • Interpret customer-supplied parts, drawings, and computer files
  • Mold layout, including materials, gates, vents, parting lines, overall size, shrinkage, heat transfer
  • Utilize any/all machine centers to achieve desired results
  • Fabricate high-quality injection molds
  • Meeting schedule commitments (on-time build)
  • Fine-tune molds based on feedback from molding department
  • Repair molds based on feedback from molding department
  • Conduct complicated mold maintenance as needed
  • T/R housekeeping, keep machine centers and personal tools orderly
  • Notify manager or project manager of any materials or tools required
  • Participate in corrective / preventive action reviews (assist production in troubleshooting)

PLEASE SUBMIT CURRENT RESUME AND COVER LETTER AND LET US KNOW HOW YOU CAN BENEFIT THE COMPANY WITH YOUR SKILLSET.
Compensation:
Salary bonus based on Performance
Qualifications
Essential Duties and Responsibilities:
  • Competent, safe operation of manual milling machines and lathes
  • Programming, set-up and operation CNC milling machines, CNC WEDM machines (Charmilles and Sodick), CNC Die sinking EDM machines, Manual EDM machines, saws, surface grinders
  • 3 axis and 5 axis CNC operation
  • Interpret customer-supplied parts, drawings, and computer files
  • Mold layout, including materials, gates, vents, parting lines, overall size, shrinkage, heat transfer
  • Utilize any/all machine centers to achieve desired results
  • Fabricate high-quality injection molds
  • Meeting schedule commitments (on-time build)
  • Fine-tune molds based on feedback from molding department
  • Repair molds based on feedback from molding department
  • Conduct complicated mold maintenance as needed
  • T/R housekeeping, keep machine centers and personal tools orderly
  • Notify manager or project manager of any materials or tools required
  • Participate in corrective / preventive action reviews (assist production in troubleshooting)

Additional Information
All your information will be kept confidential according to EEO guidelines.

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