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Plastic Injection Molding Machine Operator Jobs in Arnold, MO

Process Technician

Saint Louis, MO · On-site

$23 - $35/hr

Job Summary We're looking for a Blow and Injection Molding Process Technician to join the Semco ... Previous experience in plastics blow molding of 3-5 years, particularly with machines like Milacron ...

Process Technician

Saint Louis, MO · On-site

$23 - $35/hr

Job Summary Were looking for a Blow and Injection Molding Process Technician to join the Semco Tank ... Previous experience in plastics blow molding of 3-5 years, particularly with machines like Milacron ...

Extrusion Blow Molding machines, Stretch Blow Molding machines, Injection Molding machines, packaging systems, automated palletizers) and general facility maintenance. Equipment installation and ...

MACHINIST

Arnold, MO · On-site

$25 - $28/hr

... Do As Machine Tool Technician, you will: * CNC OperationProgramming : Set up and operated multi ... Injection Molding, Extrusion, Thermoforming, and Dip Molding experience preferred * Excellent PC ...

MACHINIST

Arnold, MO · On-site

$25 - $28/hr

... Do As Machine Tool Technician, you will: * CNC OperationProgramming : Set up and operated multi ... Injection Molding, Extrusion, Thermoforming, and Dip Molding experience preferred * Excellent PC ...

Machine Operator

Saint Peters, MO · On-site

$16.25 - $19.25/hr

Ensure all assigned machines are operating safely, efficiently and reliably, according to ... Technical/mechanical background in Plastics Industry preferred Qualification/Skills: * Basic ...

Senior Process Engineer (REQ865)

Saint Louis, MO · Remote

$106K - $137K/yr

Plastics processing technologies * Injection molding and extrusion equipment * Manufacturing ... Machine guarding and safeguarding systems * NFPA and ANSI standards compliance * Safety leadership ...

Senior Process Engineer (REQ865)

Saint Louis, MO · On-site +1

$98K - $127K/yr

Plastics processing technologies * Injection molding and extrusion equipment * Manufacturing ... Machine guarding and safeguarding systems * NFPA and ANSI standards compliance * Safety leadership ...

Machinist

Arnold, MO

$18.25 - $24.75/hr

... As Machine Tool Technician, you will: * CNC Operation & Programming : Set up and operated multi ... Injection Molding, Extrusion, Thermoforming, and Dip Molding experience preferred * Excellent PC ...

Machinist

Arnold, MO · On-site

$18.25 - $24.75/hr

... As Machine Tool Technician, you will: * CNC Operation & Programming : Set up and operated multi ... Injection Molding, Extrusion, Thermoforming, and Dip Molding experience preferred * Excellent PC ...

Machinist

Arnold, MO · On-site

$50K - $60K/yr

... As Machine Tool Technician, you will: * CNC Operation & Programming : Set up and operated multi ... Injection Molding, Extrusion, Thermoforming, and Dip Molding experience preferred * Excellent PC ...

Machine Operator

Saint Louis, MO · On-site

$21 - $32/hr

Machine Operators will perform quality checks on containers to ensure proper specifications are ... Experience in plastics or packaging industry a plus * Working knowledge of computer operating ...

Extrusion Blow Molding machines, Stretch Blow Molding machines, Injection Molding machines, packaging systems, automated palletizers) and general facility maintenance. • Equipment installation and ...

Machine Operator

Saint Louis, MO · On-site

$21 - $32/hr

Machine Operators will perform quality checks on containers to ensure proper specifications are ... Experience in plastics or packaging industry a plus * Working knowledge of computer operating ...

Set-up Technician

Saint Louis, MO · On-site

$21 - $24/hr

These change overs will be on injection and extrusion blow mold machines. This responsibility will ... Required to understand and operate machine operator controls, heater settings, and service settings ...

Showing results 41-60

Plastic Injection Molding Machine Operator information

See Arnold, MO salary details

$10

$16

$20

How much do plastic injection molding machine operator jobs pay per hour?

As of Sep 6, 2026, the average hourly pay for plastic injection molding machine operator in Arnold, MO is $16.11, according to ZipRecruiter salary data. Most workers in this role earn between $14.47 and $17.26 per hour, depending on experience, location, and employer.

What is a plastic injection molding machine operator?

A Plastic Injection Molding Machine Operator is responsible for setting up, operating, and monitoring injection molding machines used to produce plastic parts. They ensure machines run efficiently, troubleshoot issues, perform quality checks, and maintain a clean work environment. Operators may also adjust machine settings, replace molds, and inspect finished products for defects. Their role is essential in manufacturing industries that produce plastic components for automotive, medical, and consumer goods.

What does a plastic injection molding machine operator do during a typical shift?

As a Plastic Injection Molding Machine Operator, your typical shift will involve setting up and monitoring injection molding machines, inspecting finished products for quality, and performing minor equipment maintenance as needed. You will often work on your feet for extended periods in a manufacturing environment and may rotate between day, evening, or overnight shifts depending on the employer. Teamwork is important, as you'll frequently collaborate with supervisors, quality control personnel, and other machine operators to meet production goals. Staying vigilant and responsive to machine alarms or quality issues is a key part of the daily routine.

What are the key skills and qualifications needed to thrive as a plastic injection molding machine operator?

To thrive as a Plastic Injection Molding Machine Operator, you need a good understanding of machine operation, mechanical aptitude, attention to detail, and a high school diploma or equivalent. Familiarity with industry-standard molding machines, quality inspection tools, and safety protocols, as well as certificates in manufacturing or machine operation, are often advantageous. Strong problem-solving skills, teamwork, and effective communication help individuals excel in this role. These abilities ensure efficient production runs, high-quality products, and a safe, collaborative work environment.

What cities near Arnold, MO are hiring for Plastic Injection Molding Machine Operator jobs?

Cities near Arnold, MO with the most Plastic Injection Molding Machine Operator job openings:

Infographic showing various Plastic Injection Molding Machine Operator job openings in Arnold, MO as of August 2026, with employment types broken down into 89% Full Time, and 11% Part Time. Highlights an 100% In-person job distribution, with an average salary of $33,499 per year, or $16.1 per hour.

Set Up 3rd Shift M-F 10:40pm-7:00am

Koller Craft LLC

Fenton, MO • On-site

$18.75 - $23.25/hr

Full-time

Posted 2 days ago

New


Job description

Safely remove, install, and secure molds in injection molding machines using 10-ton, 20-ton, and 30-ton overhead cranes.
Connect and troubleshoot water, electrical, hydraulic, and pneumatic systems.
Set up and operate auxiliary equipment, including chillers, thermolators, and heat controllers.
Utilize knowledge of mold cores, valve gate systems, and hot runner controls.
Adjust robotic systems to support efficient production operations.
Follow company safety procedures and maintain compliance with all manufacturing standards.
Equal Opportunity Employer
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