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Injection Molding Supervisor Jobs in Riverside, CA

VPET USA LLC

QC Manager

Fontana, CA · On-site

... supervisory experience preferred. • Plastic injection molding experience desirable, preferably in a multi-plant environment • ASQ Certified Quality Engineer, Quality Auditor, Quality Manager and ...

VPET USA, LLC

QC Manager

Fontana, CA · On-site

... supervisory experience preferred. • Plastic injection molding experience desirable, preferably in a multi-plant environment • ASQ Certified Quality Engineer, Quality Auditor, Quality Manager and ...

Balda C Brewer

Quality Engineer

Ontario, CA · On-site

$80K - $120K/yr

... Supervisor Representative, as assigned. * Plan, prepare, and execute Internal Audits, as assigned ... Previous experience in plastic injection molding related environment. * Demonstrated experience to ...

Pexco

Set-Up

Yorba Linda, CA · On-site

Work closely with engineers, supervisors, and quality inspectors to resolve machining or set-up ... injection molding of high-performance polymer parts. In addition, Pexco offers a wide range of ...

medplast

Team Leader

Upland, CA · On-site

$22.50 - $26.50/hr

Required - Three (3) years experience in injection molding environment. * One (1) year experience in supervisory/lead role. * Preferred - Experience in biomedical or pharmaceutical industry. Familiar ...

medplast

Team Leader

Upland, CA

$22.50 - $26.50/hr

Required - Three (3) years experience in injection molding environment. * One (1) year experience in supervisory/lead role. * Preferred - Experience in biomedical or pharmaceutical industry. Familiar ...

Viant

Team Leader

Upland, CA · On-site

$22.50 - $26.50/hr

Required - Three (3) years experience in injection molding environment. * One (1) year experience in supervisory/lead role. * Preferred - Experience in biomedical or pharmaceutical industry. Familiar ...

medplast

Team Leader

Upland, CA

$22.50 - $26.50/hr

Required - Three (3) years experience in injection molding environment. * One (1) year experience in supervisory/lead role. * Preferred - Experience in biomedical or pharmaceutical industry. Familiar ...

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All JobsInjection Molding Supervisor JobsInjection Molding Supervisor Jobs in Riverside, CA

Injection Molding Supervisor information

See Riverside, CA salary details

$17

$28

$38

How much do injection molding supervisor jobs pay per hour?

As of Jun 16, 2026, the average hourly pay for injection molding supervisor in Riverside, CA is $28.70, according to ZipRecruiter salary data. Most workers in this role earn between $25.82 and $31.83 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Injection Molding Supervisor position, and why are they important?

To thrive as an Injection Molding Supervisor, you need a strong understanding of injection molding processes, equipment operations, and production management, often supported by experience in manufacturing and technical training. Familiarity with manufacturing software (like ERP or MES systems), SPC tools, and certifications such as Six Sigma or RJG Master Molder is highly valued. Strong leadership, problem-solving, and communication skills help you effectively manage teams and coordinate with other departments. These competencies are essential for maintaining quality standards, optimizing production efficiency, and ensuring safe and smooth operations.

What does an Injection Molding Supervisor do?

An Injection Molding Supervisor oversees the injection molding production process, ensuring efficient operation, quality control, and adherence to safety standards. They manage machine operators, troubleshoot equipment issues, and optimize production schedules to meet deadlines. Additionally, they collaborate with quality control teams to ensure products meet specifications and implement process improvements for efficiency and cost reduction.

What are some typical challenges an Injection Molding Supervisor may face on the job?

Injection Molding Supervisors often encounter challenges such as minimizing machine downtime, maintaining consistent product quality, and balancing tight production schedules. They frequently need to troubleshoot equipment issues quickly while also training and motivating operators to follow best practices. Effective supervisors must adapt to rapidly changing production demands and work closely with maintenance, quality, and engineering teams to resolve problems efficiently. Overcoming these challenges requires a mix of technical know-how, organizational skills, and strong leadership. Embracing these demands can help supervisors develop valuable expertise and advance to higher management roles within manufacturing.

What are popular job titles related to Injection Molding Supervisor jobs in Riverside, CA? For Injection Molding Supervisor jobs in Riverside, CA, the most frequently searched job titles are:
What job categories do people searching Injection Molding Supervisor jobs in Riverside, CA look for? The top searched job categories for Injection Molding Supervisor jobs in Riverside, CA are:
Injection Molding Supervisor jobs near you
Infographic showing various Injection Molding Supervisor job openings in Riverside, CA as of June 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $59,697 per year, or $28.7 per hour.

Production Operator, 1st Shift (Plastics Injection Molding)

Balda C Brewer

Ontario, CA • On-site

$17 - $18/hr

Full-time

Posted 3 hours ago

Job description

Operate injection molding machines following instructions and written requirements. Collect parts, inspect, separate and package as required per requirements. Separate and document known defective parts on required forms. Inform Supervisor or Technician when defects exceed allowable amounts.

Essential Job Functions and Responsibilities:

· Follow all safety rules and guidelines. Report any unsafe conditions or practices.

· Maintain a clean work area through-out the shift.

· Report to assigned machine on time. Always take breaks & lunch at appropriate times as instructed returning to work area promptly.

· Work with shift production leads as required.

· At start of shift read, understand, and ask questions regarding training to work instructions. If your unsure how to proceed, escalate to shift supervisor.

· Receive training by a higher-level operator and follow the operator instruction.

· Check the packaged parts before relieving the previous shift operator, report any discrepancies immediately.

· Run the mold at the standard cycle time.

· Perform visual inspections of product checking quality as trained reporting immediately any discrepancies to your lead assistant, lead, or technician.

· Record the amount of defective parts on defects scrap form. Report to the lead assistant, lead, or technician every time that the scrap is more than allowed.

· Package product according to work instructions.

· Verify labels against work order and work center.

· Help perform line clearances on their assigned work centers.

· Verify that assigned work centers have the necessary equipment and materials for the whole shift.

· Label bags, or containers of products with date, your stamp or initials accepting the product packaged is per the work instructions and quality requirements. Do not fill out labels in advance.

· At shift end, escalate any issues with your work center to shift supervisor to include in their rundown to incoming shift.

Core Competencies:

· Fluency in English: Being able to read, write, and speak is a requirement

· Fluency in Spanish is a plus.

  • Cosmetic Inspection
  • Housekeeping
  • General Safety
  • Time Management

Knowledge, Skills, and Abilities:

  • Team Work
  • Inspection Skills
  • Organizational Skills
  • Customer Service (internal or external)

· Good Attendance/Dependability

· Basic math skills

· Good Communication skills

· Be honest and respectful to everyone at all times.

Education and/or Experience:

· High School Diploma or GED.

· Some factory related experience preferred but not mandatory.

Training Requirements:

· General Safety.

· GMP & Cleanliness.

· Clean room Gowning Procedure.

· Training to Work orders/work centers.

· Work instructions and SOP training

· MSDS

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