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Plastic Engineering Jobs in Missouri (NOW HIRING)

Pretium Packaging

Process Engineer

Saint Louis, MO · On-site

$90K - $130K/hr

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Charles Industries, LLC.

Manufacturing Engineer

Canton, MO · On-site

$71K - $91K/yr

A bachelor's degree in engineering, plastics engineering, or a related field is preferred. * Minimum of 3 years of engineering or manufacturing experience, preferably with a background in ...

Pretium Packaging

Process Engineer

Saint Louis, MO · On-site

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

US Farathane

Manufacturing Engineering Manager

Riverside, MO

$106K - $132K/yr

US Farathane has been a leading source of plastics manufacturing, supplying the automotive industry ... Lead and manage daily activities of the engineering department, including manufacturing, process ...

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All JobsPlastic Engineering JobsPlastic Engineering Jobs in Missouri

Plastic Engineering information

See Missouri salary details

$34.2K

$61.2K

$101.8K

How much do plastic engineering jobs pay per year?

As of Aug 9, 2026, the average yearly pay for plastic engineering in Missouri is $61,219.00, according to ZipRecruiter salary data. Most workers in this role earn between $45,500.00 and $74,600.00 per year, depending on experience, location, and employer.

What are some common challenges faced by plastic engineers when working on new product development, and how are they typically addressed?

Plastic engineers often encounter challenges such as selecting the right polymer materials, ensuring manufacturability, and meeting strict quality and regulatory standards. These challenges are typically addressed by collaborating closely with material scientists, product designers, and manufacturing teams to select optimal materials and refine designs for specific applications. Engineers also conduct rigorous testing and simulations to predict performance and identify potential issues early in the development process. Ongoing professional development and staying updated with advancements in polymer technology are crucial for overcoming these challenges effectively.

What are the key skills and qualifications needed to thrive as a plastic engineer, and why are they important?

To thrive as a Plastic Engineer, you need a solid background in polymer science, materials engineering, and manufacturing processes, typically supported by a degree in chemical or plastics engineering. Familiarity with CAD software, injection molding machinery, and quality control systems is essential in this field. Strong problem-solving skills, attention to detail, and effective teamwork are crucial soft skills for excelling in complex project environments. These competencies ensure the development of innovative, high-quality plastic products and efficient manufacturing operations.

What is the difference between Plastic Engineering vs Mechanical Engineering?

AspectPlastic EngineeringMechanical Engineering
CredentialsBachelor's in Plastic Engineering or related fieldBachelor's in Mechanical Engineering
Work EnvironmentPlastic product design, manufacturing, and materials testingMechanical systems design, analysis, and manufacturing
Industry UsagePlastics manufacturing, automotive, packagingAutomotive, aerospace, industrial machinery
Common Search IntentPlastic Engineering vs Mechanical Engineering

Plastic Engineering focuses on the development, processing, and testing of plastic materials and products, often within manufacturing settings. Mechanical Engineering covers a broader range of mechanical systems and devices, including metals and other materials. While both fields involve design and manufacturing, Plastic Engineering specializes in plastics, making it more specific to industries like plastics production and packaging.

What is plastic engineering?

Plastic engineering is a specialized branch of engineering that focuses on the design, development, processing, and manufacturing of plastic materials and products. Professionals in this field work with various types of plastics, developing new materials, improving manufacturing processes, and creating innovative products for industries such as automotive, packaging, medical devices, and consumer goods. Plastic engineers also address challenges related to sustainability and recycling, aiming to make plastic products more environmentally friendly.
What cities in Missouri are hiring for Plastic Engineering jobs? Cities in Missouri with the most Plastic Engineering job openings:
Plastic Engineering jobs near you
Infographic showing various Plastic Engineering job openings in Missouri as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $61,219 per year, or $29.4 per hour.

Process Engineer - Plastics

American Plastics, LLC

Jefferson City, MO • On-site

Full-time

Medical, Dental, Retirement, PTO

Re-posted 15 days ago

Job description

Description

American Plastics, headquartered in St. Louis, Missouri, is a leading designer and manufacturer of innovative plastic-injection molded products for the household & garage storage and commercial cleaning end-markets. We are searching for an energetic driven Process Engineer for our Jefferson City, MO location.  This position will spend 90% of their time on the plant floor and will report to the Plant Manager. 


Responsibilities:

Coordinate & run processing trials for both materials and product development

Develop & run design of experiments

Program robots for optimum cycle time and Training Production Staff as needed

Lead troubleshooting and develop permanent corrective action for various product defects

Lead continuous improvement teams for cycle time & scrap reduction

Assist with production for startup, shut down

Lead corrective action teams for root cause analysis and permanent corrective action procedures

Analyze, develop and implement workstation layouts for labor optimization

Other duties as assigned by Management

Lead New Product Development APQP meetings

Lead New Product/Customer Quote Inquires as required


Requirements

Requirements:

Bachelor's degree in Plastic Engineering or related field

Minimum of 2 years in processing engineering experience - Degree may be waived based on relevant experience

Excellent oral and written communication skills

May participate in housekeeping, 6S, and/or in Lean activities

Other duties and special projects as assigned by Management

Must have experience with Microsoft Word, Excel and PowerPoint


Expectations:

Run a safe, clean operation which promotes zero accidents

Follow all company procedures and policies

Work well with all levels of employees and Management

Work overtime as required to complete all required tasks

If you are interested in joining the American Plastics team and want to work in a fast-paced, progressive environment, we want to hear from you.  We offer a competitive salary, full benefit package including medical/dental, 401k, and paid vacation. 

Apply