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Process Engineer Jobs in O Fallon, MO (NOW HIRING)

Senior Process Engineer (REQ865)

Saint Louis, MO · Remote

$106K - $137K/yr

Senior Process Engineer Maryland Heights, MO Spartech offers a competitive salary, incentives, and benefit programs! Spartech, LLC, headquartered in Maryland Heights, Missouri, has over a dozen ...

Senior Process Engineer (REQ865)

Saint Louis, MO · On-site +1

$98K - $127K/yr

Senior Process Engineer Maryland Heights, MO Spartech offers a competitive salary, incentives, and benefit programs! Spartech, LLC, headquartered in Maryland Heights, Missouri, has over a dozen ...

Process Lead Engineer

Saint Louis, MO · On-site

$96K - $125K/yr

The Process Engineer works closely with clients, process architects, utilities engineers, mechanical engineers, and construction teams to translate manufacturing processes into clear, coordinated ...

Process Lead Engineer

Saint Louis, MO

$96K - $125K/yr

The Process Engineer works closely with clients, process architects, utilities engineers, mechanical engineers, and construction teams to translate manufacturing processes into clear, coordinated ...

Process Lead Engineer

Saint Louis, MO · On-site

$96K - $125K/yr

The Process Engineer works closely with clients, process architects, utilities engineers, mechanical engineers, and construction teams to translate manufacturing processes into clear, coordinated ...

Process Lead Engineer

Saint Louis, MO · On-site

$96K - $125K/yr

The Process Engineer works closely with clients, process architects, utilities engineers, mechanical engineers, and construction teams to translate manufacturing processes into clear, coordinated ...

Process Lead Engineer

Saint Louis, MO

$96K - $125K/yr

The Process Engineer works closely with clients, process architects, utilities engineers, mechanical engineers, and construction teams to translate manufacturing processes into clear, coordinated ...

Senior Process Engineer - Liquid Systems

Saint Louis, MO · On-site

$101K - $130K/yr

We are seeking a Senior Process Engineer with deep expertise in liquid processing systems within the food and beverage industry . This role will lead the design and execution of process systems for ...

Works closely with Controls engineers for design of new or improved control process. Interacts with other departments such as quality, PD, Maintenance, and Manufacturing. Provides support and ...

Works closely with Controls engineers for design of new or improved control process. Interacts with other departments such as quality, PD, Maintenance, and Manufacturing. Provides support and ...

Showing results 21-40

Process Engineer information

See O Fallon, MO salary details

$46.3K

$86.1K

$133.3K

How much do process engineer jobs pay per year?

As of Aug 6, 2026, the average yearly pay for process engineer in O'Fallon, MO is $86,081.00, according to ZipRecruiter salary data. Most workers in this role earn between $69,700.00 and $96,400.00 per year, depending on experience, location, and employer.

What is the work of a process engineer?

A process engineer designs, develops, and optimizes manufacturing processes to improve efficiency, quality, and safety. They analyze production workflows, troubleshoot issues, and implement improvements using tools like process flow diagrams and statistical analysis. Strong problem-solving skills and knowledge of industry standards are essential for this role.

What are some common challenges process engineers face when implementing process improvements, and how can they overcome them?

Process Engineers often encounter challenges such as resistance to change from team members, integrating new technologies with existing systems, and ensuring process changes meet regulatory standards. Overcoming these obstacles typically involves clear communication, involving stakeholders early in the process, thorough documentation, and piloting changes before full-scale implementation. Building strong cross-functional relationships and continuously gathering feedback also help ensure that improvements are effective and sustainable.

What is a process engineer?

Process Engineers are professionals who design, implement, and optimize industrial processes to improve efficiency, quality, and safety in manufacturing or production environments. They analyze workflows, troubleshoot process issues, and develop solutions to enhance productivity and reduce costs. Process Engineers often work in industries such as chemicals, pharmaceuticals, food and beverage, and energy, ensuring processes are compliant with environmental and safety regulations. Their work is vital for maintaining smooth operations and achieving organizational goals.

What jobs do process engineers do?

Process engineers design, develop, and optimize manufacturing processes to improve efficiency, safety, and quality. They analyze production data, troubleshoot issues, and implement process improvements using tools like process flow diagrams and statistical analysis. Their work often involves collaboration with production teams and requires knowledge of engineering principles and industry standards.

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

To thrive as a Process Engineer, you need a solid background in chemical, mechanical, or industrial engineering, often supported by a relevant bachelor's degree and understanding of process optimization principles. Familiarity with process simulation software (such as Aspen Plus or AutoCAD), Six Sigma methodologies, and quality management systems is typically required. Strong analytical thinking, problem-solving abilities, and effective communication skills set candidates apart in this role. These skills and qualifications are essential to improve efficiency, ensure safety, and drive continuous improvement in industrial and manufacturing processes.

What is the difference between Process Engineer vs Manufacturing Engineer?

AspectProcess EngineerManufacturing Engineer
CredentialsBachelor's in Engineering, certifications like Six SigmaBachelor's in Engineering, certifications like Lean Manufacturing
Work EnvironmentDesigning and optimizing processes, R&D settingsOverseeing production lines, factory floors
Industry UsageManufacturing, chemical, aerospaceAutomotive, electronics, consumer goods

Process Engineers focus on designing and improving manufacturing processes, often working in R&D or engineering departments. Manufacturing Engineers concentrate on implementing and managing production on the factory floor. Both roles require similar technical skills and certifications but differ mainly in their scope and work environment.

What are the most commonly searched types of Process Engineer jobs in O'Fallon, MO? The most popular types of Process Engineer jobs in O'Fallon, MO are:
What are popular job titles related to Process Engineer jobs in O'Fallon, MO? For Process Engineer jobs in O'Fallon, MO, the most frequently searched job titles are:
What cities near O'Fallon, MO are hiring for Process Engineer jobs? Cities near O'Fallon, MO with the most Process Engineer job openings:
Infographic showing various Process Engineer job openings in O'Fallon, MO as of July 2026, with employment types broken down into 100% Contract. Highlights an 100% In-person job distribution, with an average salary of $86,081 per year, or $41.4 per hour.

Senior Process Engineer (REQ865)

Spartech

Saint Louis, MO • Remote

$106K - $137K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 13 days ago


Spartech rating

5.8

Company rating: 5.8 out of 10

Based on 18 frontline employees who took The Breakroom Quiz

72nd of 84 rated plastic manufacturers


Job description

Senior Process Engineer

Maryland Heights, MO

Spartech offers a competitive salary, incentives, and benefit programs!

Spartech, LLC, headquartered in Maryland Heights, Missouri, has over a dozen locations throughout the United States. We have a broad customer base with extensive product offerings and technologies. Many of our materials are used in products you might see every day - for example if you start your morning with a single serve yogurt, the container you ate from may be made from one of Spartech’s products or the refrigerator where the yogurt was stored could have Spartech products in its interior features. More unique uses of our products can be seen in military or security applications, for example in fighter jet canopies or bullet resistant windows. From routine daily-life to life-saving applications—we make a difference. Our broad scope of products and services keep our environment interesting and challenging with a culture focused on success. If you want to make a difference in a fast-paced environment with a company large enough to offer you room to grow but not so large that you become “just a number”, Spartech might be the ideal company for you.

General Summary and Essential Duties & Responsibilities:

The Senior Process Engineer is responsible for leading capital equipment projects that support the growth, modernization, safety, and optimization of plastics manufacturing operations. This position manages projects from concept through production startup, including identifying and developing equipment specifications, vendor evaluation, process design, commissioning, and ensuring compliance with all applicable safety and regulatory requirements.

Requirements

Key Responsibilities:

Capital Planning & Equipment Strategy

  • Evaluate manufacturing capacity requirements and identify capital equipment investments needed to support business growth.
  • Develop equipment specifications for extrusion, cast acrylic manufacturing, resin handling, material conveying, blending, automated packaging, robotics, and secondary operations.

Equipment Procurement & Vendor Management

  • Develop RFQs, technical specifications, and statements of work for capital equipment projects.
  • Solicit, review, and compare vendor quotations, technical proposals, and commercial terms.

Project Management

  • Lead capital equipment projects from concept through startup and full production validation.

Equipment Installation & Commissioning

  • Manage equipment delivery, rigging, installation, utility connections, and startup activities.
  • Coordinate facility modifications, electrical requirements, compressed air systems, chilled water systems, resin delivery systems, and process cooling infrastructure.

Process Optimization & Continuous Improvement

  • Analyze production performance following implementation and identify opportunities for optimization.
  • Support OEE improvement initiatives and manufacturing cost reduction programs.
  • Partner with Operations and Process Engineering teams to improve machine utilization, efficiency, and product quality.

Safety, Regulatory & Compliance Responsibilities

  • Lead the integration of safety requirements into all capital equipment projects from concept through startup.
  • Ensure equipment designs comply with OSHA regulations, machine guarding requirements, lockout/tagout (LOTO) standards, electrical safety requirements, and applicable ANSI, NFPA, and industry standards.

Drive a zero-injury culture by promoting safe work practices and proactively addressing safety concerns throughout project execution.

Education & Experience Requirements:

  • Bachelor's degree in Chemical Engineering, Mechanical Engineering, Manufacturing Engineering, Industrial Engineering, Electrical Engineering, or related technical discipline.
  • 7+ years of experience managing capital equipment projects within a plastics manufacturing environment.
  • Chemical manufacturing background.
  • Experience with injection molding, extrusion, thermoforming, blow molding, or related plastics processing technologies.

Knowledge, Skills & Abilities:

  • Capital equipment acquisition and implementation
  • Plastics processing technologies
  • Injection molding and extrusion equipment
  • Manufacturing process optimization
  • Equipment validation and commissioning
  • Project management and budget administration
  • Lockout/Tagout (LOTO) implementation
  • Machine guarding and safeguarding systems
  • NFPA and ANSI standards compliance
  • Safety leadership and culture development

Benefits

We offer competitive salary, incentives, and benefit programs. – Most Benefits Start Day ONE!

Benefits include:

  • Medical, Dental, and Vision.
  • Flexible Spending Accounts.
  • Company paid Life & Long-term/Short-term disability programs.
  • 401(k) with strong company match.
  • 120 hours Paid Time Off (pro-rated based on hire date).
  • 11 paid holidays.

Spartech, LLC provides equal employment opportunity to all qualified applicants regardless of race, color, religion, national origin, sex, sexual orientation, gender identity, age, disability, genetic information, or veteran status, or other legally protected classification in the state in which a person is seeking employment. Spartech will use E-Verify to ensure employment eligibility of newly hired employees where required.


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