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Engineering Jobs in O'Fallon, Missouri

Jobs found: 1028
3 days ago 41. Process Engineer: Plant Productivity & Optimization

Engineering (Process Engineer, Manufacturing Engineer, Quality Engineering), Manufacturing / Production (Manufacturing Engineer, Quality Engineering)

Lhoist North America, located in Ste. Genevieve, Missouri, is seeking a Process Engineer to direct and coordinate process engineering...

Process Engineer: Plant Productivity & Optimization Job

Listing for: Lhoist
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3 days ago 42. Senior Mechanical Power Engineer

Engineering (Electrical Engineering, Environmental Engineer, Energy Engineer, Mechanical Engineer), Energy/Power Generation (Electrical Engineering, Energy Engineer)

Senior Mechanical Power Engineer - ( 195053 ) - At HDR, our employee - owners are fully engaged in creating a welcoming environment...

Senior Mechanical Power Engineer Job

Listing for: Fashion Institute of Design & Merchandising
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3 days ago 43. Senior Power Mechanical Engineer – Lead Large-Scale Projects

Engineering

HDR is seeking an experienced Senior Mechanical Power Engineer to join the Missouri - based Power Generation team. You will lead a...

Senior Power Mechanical Engineer – Lead Large-Scale Projects Job

Listing for: Fashion Institute of Design & Merchandising
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3 days ago 44. 2027 Co-Op Engineers

Engineering (Quality Engineering), Quality Assurance - QA/QC (Quality Engineering, Quality Control - QC Analysts/Managers)

2026 Engineering Co - Op - This is an Engineering Co - op position that will split time between Quality Assurance and Product...

2027 Co-Op Engineers Job

Listing for: Rawlings Sporting Goods
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3 days ago 45. 2027 Co-Op Engineers

Engineering (Quality Engineering)

2027 Engineering Co - Op - Job Title: - 2026 Engineering Co - Op - Department: - Engineering - Reports to: - Director of Research and...

2027 Co-Op Engineers Job

Listing for: Rawlings Sporting Goods
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3 days ago 46. Remote Waterworks Estimator: Pipes & Infrastructure

Construction (Estimator), Engineering (Estimator)

PACE Supply Corp. is seeking a detail - oriented Estimator for Waterworks to support Northern California projects in a fully remote role....

Remote Waterworks Estimator: Pipes & Infrastructure Job

Listing for: PACE Supply Corp.
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4 days ago 47. Entry-Level Industrial Controls Engineer

Engineering (Systems Engineer)

CRB is seeking a talented Control System Developer to design, program, and implement automated control systems for a range of industrial...

Entry-Level Industrial Controls Engineer Job

Listing for: CRB
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4 days ago 48. Plant Operator I - Wastewater Treatment

Trades / Skilled Labor (Utility Technician, Wastewater Treatment), Engineering (Wastewater Treatment)

CLASS DEFINITION - Perform a variety of semi - skilled tasks in the operation, construction, maintenance, rehabilitation, and...

Plant Operator I - Wastewater Treatment Job

Listing for: City of Branson, Missouri
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4 days ago 49. Project Manager, Government Services

Engineering (Operations Management)

ABOUT YOU - Ready to experience a better way to build your career? ARCO hires only the best and brightest dedicated to providing our...

Project Manager, Government Services Job

Listing for: Arco Ltd
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4 days ago 50. Manufacturing Engineer

Engineering (Manufacturing Engineer)

Position: MANUFACTURING ENGINEER - EXTRAORDINARY PEOPLE. EXCITING POSSIBILITIES. GREAT OPPORTUNITY. - Custom Truck One Source has changed...

Manufacturing Engineer Job

Listing for: 6AM City, LLC
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Jobs found: 1028