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Plastic Injection Mold Jobs in Missouri (NOW HIRING)

LFP Associates

Operations Manager

Kansas City, MO

$130K - $145K/yr

The Operation Manager is responsible for leading all day-to-day manufacturing operations with an plastic injection molding facility, ensuring safety, quality, delivery, and cost objectives are met.

Aerotek

Set Up Technician

Lees Summit, MO

$53K - $56K/yr

Troubleshoot issues on plastic injection and blow molding equipment to minimize downtime. * Collaborate with production and maintenance teams to prioritize and complete equipment-related tasks.

Advastar, Inc

Molding Technician

Kansas City, MO · On-site

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

Advastar, Inc

Molding Technician

Kansas City, MO · On-site

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

Advastar, Inc

Molding Technician

Kansas City, MO

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

Advastar, Inc.

Be Seen First

Tool & Die, Maintenance, Molding & Fabrication Technicians

Grandview, MO · On-site

$26 - $38/hr

NOW HIRING -- 7 SKILLED TRADES POSITIONS OPEN NOW Plastic Injection Molding Manufacturer | Kansas City, MO We're a well-established, global manufacturer of precision plastic components, and we're ...

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Plastic Injection Mold information

What is a plastic injection mold?

Plastic injection molds are specialized tools used in the injection molding process to shape molten plastic into specific forms and parts. They are typically made from durable metals like steel or aluminum and are designed to withstand high pressures and temperatures. The mold consists of two main halves that come together to form a cavity, which is then filled with melted plastic and cooled to produce the final product. Injection molds are commonly used in mass manufacturing of plastic components for industries such as automotive, consumer goods, and electronics.

What are the key skills and qualifications needed to thrive as a plastic injection mold technician?

To thrive as a Plastic Injection Mold Technician, you need a strong understanding of manufacturing processes, mechanical aptitude, and experience with mold setup and maintenance, often supported by technical training or an associate degree. Familiarity with CNC machines, injection molding equipment, and quality control systems, as well as certifications like RJG or Paulson, is highly beneficial. Attention to detail, problem-solving, and teamwork are crucial soft skills for addressing production challenges and ensuring consistent quality. These skills and qualifications are essential for maintaining efficient production, minimizing defects, and meeting safety and quality standards in a manufacturing environment.

What is the difference between Plastic Injection Mold vs Plastic Mold Technician?

AspectPlastic Injection MoldPlastic Mold Technician
Primary RoleDesign, develop, and manufacture plastic molds for injection molding processesOperate, troubleshoot, and maintain plastic molds during production
Required SkillsCAD design, mold fabrication, material selectionMachine operation, mold setup, troubleshooting
Work EnvironmentManufacturing plants, mold shopsInjection molding facilities, production lines
CertificationsOften requires technical certifications in mold design or manufacturingMachine operation certifications, safety training

While a Plastic Injection Mold focuses on designing and creating molds, a Plastic Mold Technician operates and maintains these molds during production. Both roles are essential in the injection molding industry, with overlapping skills but distinct responsibilities.

What are some common challenges faced by plastic injection mold technicians on the job?

Plastic injection mold technicians often encounter challenges related to maintaining precise quality standards, troubleshooting equipment malfunctions, and minimizing production downtime. Adjusting machine settings to accommodate different mold designs and materials can require strong attention to detail and problem-solving skills. Additionally, technicians frequently collaborate with engineers and production teams to resolve defects and optimize manufacturing processes, making communication skills important for success in this role.
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What job categories do people searching Plastic Injection Mold jobs in Missouri look for? The top searched job categories for Plastic Injection Mold jobs in Missouri are:
What cities in Missouri are hiring for Plastic Injection Mold jobs? Cities in Missouri with the most Plastic Injection Mold job openings:
Plastic Injection Mold jobs near you
Infographic showing various Plastic Injection Mold job openings in Missouri as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

Senior Plastic Injection Molding Technologist

Serioplast

Saint Louis, MO • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 29 days ago

Job description

Serioplast, a Global Leader in Rigid Plastic Packaging, is Looking for a Senior Plastic Injection Molding Technologist for its plant in St. Louis, Missouri!
Are you a professional technologist looking for an exciting opportunity to thrive in a fast-paced, global environment? Join us and take your career to new heights!
What will you do?
  • Serve as a key point of reference for Technologists and support the Technical Manager in setting priorities, removing bottlenecks, and addressing critical issues.
  • Set up product recipes, ensuring all required regulations and PLC parameters are correctly applied.
  • Perform necessary mechanical and electronic adjustments and monitor production variables to ensure product specifications are met.
  • Conduct investigations and troubleshooting to resolve quality issues.
  • Train and support production staff in resolving minor technical problems affecting product quality.
  • Carry out electromechanical installation and setup of machines and equipment (compressors, air conditioning systems, dryers, leak testers, cameras, palletizers, etc.).
  • Develop solutions by fabricating mechanical or other components to address production or technical issues and improve machine performance.
  • Support the Technical Manager in continuous improvement projects and in decisions regarding machines, equipment, molds, and processes.

What are we looking for?
  • Excellent knowledge of plastic molding technologies (EBM and/or SBM and/or IM), with specific experience in Husky injection molding of PET preforms on high-cavitation molds.
  • Excellent applied knowledge of mechanics, pneumatics, hydraulics, electrical and/or electronic systems.
  • Good applied knowledge of measuring instruments and techniques.
  • Good applied knowledge of WCM standards.
  • Minimum 5 years’ experience working with industry specific technologies and productive processes.

What do we offer?
  • Continuous training: Grow professionally by working alongside industry experts.
  • Dynamic and international environment: Join a team engaged in global projects.
  • Career growth opportunities in an industry leading company.
  • Internal mobility: Opportunities for job rotation and career progression

Additional Perks & Benefits:
  • 401(k)
  • 401(k) matching
  • Dental insurance
  • Health insurance
  • Health savings account
  • Paid time off
  • Vision insurance
Sounds like a fit? We’d love to hear from you!
Want to know more about us? Check out Who We Are and discover what makes us unique!
Upon sending their application, the candidate grants specific consent to the processing of personal data, in accordance with current legislation on privacy. The privacy policy is available at the following link: https://drive.google.com/file/d/1qpIpYwl5rqgtH3eN8C3cgCR74cc87WSm/view?usp=drive_link
Serioplast is an equal employment opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, status as a qualified individual with a disability, or any other characteristic protected by law.

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