Process Engineer Jobs in O Fallon, IL

1-15 of 15 Jobs

Process Engineer I

  • Phillips 66
  • Roxana, IL (18 miles from O Fallon, IL)
  • 17 hours ago
  • Roxana, IL (18 miles from O Fallon, IL)
  • 17 hours ago

Phillips 66 & You - Together we can fuel the future As a Process Engineer I, you will provide process technical expertise and services focused on enhancing the safety, reliability and profitability...

In Person

Process Engineer -IVD

  • Merck KGaA
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 5 days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 5 days ago

Your Role: The Process Engineer is responsible for the development, optimization, and implementation of manufacturing processes within an organization....

In Person

Principal Process Engineer - Water Treatment

  • Principal Process Engineer - Water Treatment, WTS, CDI
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 13 days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 13 days ago

Job ID REF51301D Date posted 03/18/2026 Location Virginia Category Engineering / Design / Projects Principal Process Engineer - Water Treatment Company Description Veolia Group is a global leader in...

In Person

Advanced Process Control Engineer II, Wood River Refinery

  • Phillips 66
  • Roxana, IL (18 miles from O Fallon, IL)
  • 20 days ago
  • Roxana, IL (18 miles from O Fallon, IL)
  • 20 days ago

Phillips 66 & You - Together we can fuel the future What to Expect As an Advanced Process Control Engineer II, you will blend technical expertise with hands-on problem solving to shape how our...

In Person

Process Engineer

  • Swanktek
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 21 days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 21 days ago

Minimum of 3 years of experience as a Process Engineer, Business Analyst, or similar role. Experience with warehouse management systems (WMS) and complex, established business processes....

In Person

Process Engineer

  • Green Plains
  • Madison, IL (14 miles from O Fallon, IL)
  • 29 days ago
  • Madison, IL (14 miles from O Fallon, IL)
  • 29 days ago

Summary: As a Process Engineer, you will quickly gain exposure to various challenges, current and emerging technologies, and multiple-unit operations within Green Plains Inc....

In Person

Senior Principal Continuous Improvement Engineer

  • Curium
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 30+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 30+ days ago

Salary Not Available Position range in St. Louis, MO-IL Metropolitan Statistical Area $76k - $122k Per Year Senior Principal Continuous Improvement Engineer Curium Occupation: Engineers, All Other...

In Person

Process Engineer

  • ProMach
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 30+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 30+ days ago

As a Process Engineer on our Statco-DSI team, you will work closely with our other internal team members as well as customers to craft top of industry process solutions....

In Person

Process Control Engineer I

  • US Steel Corp.
  • Granite City, IL (14 miles from O Fallon, IL)
  • 30+ days ago
  • Granite City, IL (14 miles from O Fallon, IL)
  • 30+ days ago

Job Description U. S. Steel has immediate openings for Process Control Engineers within its Process Control Systems group located in Granite City, IL. This high-profile role combines the...

In Person

Process Control Engineer

  • Big River Steel
  • Granite City, IL (14 miles from O Fallon, IL)
  • 30+ days ago
  • Granite City, IL (14 miles from O Fallon, IL)
  • 30+ days ago

U. S. Steel has immediate openings for Process Control Engineers within its Process Control Systems group located in Granite City, IL. This high-profile role combines the challenges of project...

In Person

Process Engineer Consumer & Life Solutions (Multiple Locations)

  • Burns & McDonnell
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 60+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 60+ days ago

Required or Master Degree in Chemical Engineering and 6 years process engineering experience. EPC project experience preferred....

In Person Full Time

Process Engineer

  • Elementis
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 60+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 60+ days ago

The Process Engineer enables the safe and reliable production at a low cost that meets or exceeds the customer requirements....

In Person

Process Engineer III - Central Region

  • CRB Group, Inc
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago

Job Description The Process Engineer III plays a key role in leading the design for a defined scope of work-such as an area, a series of unit operations, or systems-within a project....

In Person

Principal Process Engineer - API + OSD

  • Barry-Wehmiller
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago

When you join Design Group as a Principal Process Engineer, you are joining a team that will challenge you and position you for growth....

In Person

Senior Process Engineer - Liquid Systems

  • CRB Group, Inc
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago
  • Saint Louis, MO (15 miles from O Fallon, IL)
  • 90+ days ago

Qualifications Bachelor's degree in Chemical, Mechanical, or Process Engineering (ABET-accredited) 5+ years of experience in process engineering for liquid food or beverage systems, specifically in...

In Person

Demographic Data for O Fallon, IL

Moving to O Fallon, IL? Find some basic demographic data about O Fallon, IL below.


Local
National
36,068
805
Medium

Process Engineer Online Courses and Training Opportunities

iHire curates thousands of courses in order to recommend the best ones to help further your career. If you register for a course using the links on our site, we may receive a small commission.
Revit for Structural Engineers
Learn how to model basic building structural systems in Autodesk Revit. Building Information Modeling (BIM) has initiated a sea change in the way that buildings are designed and constructed. Old...
Mathematical Optimization for Engineers
Learn the mathematical and computational basics for applying optimization successfully. Master the different formulations and the important concepts behind their solution methods. Learn to...
Mentoring engineers with impact
This course provides a framework to become a better and more seasoned mentor. You will learn to develop and offer a sustainable and well-structured mentoring path to your mentees. As a mentor you...

Salary for Process Engineer Jobs in O Fallon, IL

Estimated salary range based on data from US Bureau of Labor Statistics (BLS) and iHire research efforts.

Licensing / Certification

Required or preferred licenses and certifications for Process Engineer positions.



Highest Education Level

Process Engineers in O Fallon, IL offer the following education background
Bachelor's Degree
51.0%
Master's Degree
34.4%
Associate's Degree
4.9%
Doctorate Degree
4.6%
Vocational Degree or Certification
2.6%
High School or GED
1.8%
Some College
0.5%
Some High School
0.0%

Average Work Experience
Here's a breakdown of the number of years' experience offered by Process Engineers in O Fallon, IL
2-4 years
23.6%
10+ years
18.1%
Less than 1 year
17.7%
1-2 years
16.4%
None
9.4%
8-10 years
6.1%
6-8 years
4.7%
4-6 years
4.0%