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Senior Process Engineer Jobs in Missouri (NOW HIRING)

Sr Process Engineer

Louisiana, MO · On-site

$125 - $150/hr

- Sr Process Engineer (26001AU) Sr Process Engineer - 26001AU Description Valero is the best-in-class producer of essential fuels and products that are foundational to modern life. We invite you to ...

Senior Process Engineer CEM

Bloomsdale, MO · On-site

$89K - $115K/yr

The Senior Process Engineer leads plant discussions and investigations to improve throughput, efficiency, quality, and environmental performance. Through data analysis, field measurements, and ...

Senior Process Engineer, Cement Plant

Weingarten, MO · On-site

$92K - $119K/yr

Senior Process Engineer CEM | Req ID: 16705 | Location: Ste. Genevieve Cement MO ABOUT THE ROLE The Senior Process Engineer leads plant discussions and investigations to improve throughput ...

Experience: Mid Level Salary: $95,000 - $130,000 per year Job Details Senior Process Engineer Location: Charleston, IL Lead Engineering. Drive Continuous Improvement. Shape the Future of ...

Senior Process Engineer, Cement Plant

Bloomsdale, MO · On-site

$89K - $115K/yr

Senior Process Engineer CEM | Req ID: 16705 | Location: Ste. Genevieve Cement MO ABOUT THE ROLE The Senior Process Engineer leads plant discussions and investigations to improve throughput ...

Senior Process Engineer, Cement Plant

Bloomsdale, MO · On-site

$89K - $115K/yr

Senior Process Engineer CEM | Req ID: 16705 | Location: Ste. Genevieve Cement MO ABOUT THE ROLE The Senior Process Engineer leads plant discussions and investigations to improve throughput ...

Senior Process Engineer

Mount Vernon, MO · On-site

$81K - $105K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

Senior Process Engineer

Monett, MO · On-site

$90K - $116K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

Senior Process Engineer

Monett, MO · On-site

$90K - $116K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

Senior Process Engineer

Mount Vernon, MO · On-site

$81K - $105K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

Senior Process Engineer

Mount Vernon, MO · On-site

$81K - $105K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

Senior Process Engineer

Monett, MO · On-site

$90K - $116K/yr

As a Senior Process Engineer at Schreiber Foods, you will play a pivotal role in optimizing our production processes, ensuring the efficient and cost-effective manufacturing of our food products. You ...

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 ...

Senior Process Engineer

California, MO · On-site

$100 - $125/hr

Execute process changes using Management of Change (MOC) tools while supporting safe, repeatable manufacturing operations What makes you a good fit * Bachelor's degree in Chemical Engineering ...

Sr Process Engineer

California, MO · On-site

$100 - $125/hr

Meet The Team Join our dynamic manufacturing engineering team at the San Diego Innovation Center of Excellence, where we lead development, scale up, and transfer of products, manufacturing processes ...

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 ...

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Showing results 1-20

Senior Process Engineer information

See Missouri salary details

$70.3K

$113.6K

$159.9K

How much do senior process engineer jobs pay per year?

As of Sep 8, 2026, the average yearly pay for senior process engineer in Missouri is $113,607.00, according to ZipRecruiter salary data. Most workers in this role earn between $97,600.00 and $126,200.00 per year, depending on experience, location, and employer.

What does a senior process engineer do?

A Senior Process Engineer is responsible for designing, optimizing, and overseeing processes within manufacturing or production environments. They analyze workflows, troubleshoot issues, and implement improvements to increase efficiency, safety, and product quality. Senior Process Engineers often lead projects, mentor junior engineers, and collaborate with cross-functional teams to ensure operational excellence. Their expertise is vital in industries like chemicals, pharmaceuticals, oil and gas, and food processing.

What are the key skills and qualifications needed to thrive as a senior process engineer?

To thrive as a Senior Process Engineer, you need a strong background in chemical or process engineering, problem-solving skills, and typically a bachelor's or master's degree in a relevant field. Expertise in process simulation software (such as Aspen Plus or HYSYS), Six Sigma or Lean certifications, and familiarity with process control systems are highly valued. Outstanding analytical abilities, leadership, and effective communication set top performers apart in this role. These skills and qualifications are crucial for optimizing processes, ensuring safety and compliance, and leading teams to achieve operational excellence.

What are some common challenges senior process engineers face when working on cross-functional teams?

Senior Process Engineers often collaborate with professionals from various departments, such as operations, quality, and maintenance. A common challenge is aligning diverse priorities and communication styles to achieve shared project goals. Successfully managing these differences requires strong interpersonal and project management skills, as well as the ability to translate technical concepts for non-engineering colleagues. Regular meetings and clear documentation can help ensure everyone stays informed and engaged throughout the process.

What is the difference between Senior Process Engineer vs Process Engineer?

AspectSenior Process EngineerProcess Engineer
QualificationsBachelor's or Master's in Engineering, often with 5+ years experienceBachelor's degree in Engineering or related field, typically 1-3 years experience
ResponsibilitiesLeading process improvements, mentoring, project managementSupporting process development, data analysis, assisting senior staff
Work EnvironmentDesign teams, manufacturing plants, R&D departmentsManufacturing facilities, engineering teams, operational support

Senior Process Engineers typically have more experience, leadership duties, and oversee complex projects, while Process Engineers focus on supporting process development and implementation. Both roles are essential in manufacturing and engineering industries, but the senior role involves greater responsibility and strategic planning.

How much does a senior process engineer earn?

A senior process engineer typically earns between $80,000 and $130,000 annually, depending on experience, industry, and location. They often have specialized skills in process optimization, project management, and may hold certifications like Six Sigma or PE licensure.

What are the most commonly searched types of Process Engineer jobs in Missouri?

The most popular types of Process Engineer jobs in Missouri are:

What are popular job titles related to Senior Process Engineer jobs in Missouri?

For Senior Process Engineer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Senior Process Engineer jobs in Missouri look for?

The top searched job categories for Senior Process Engineer jobs in Missouri are:

What cities in Missouri are hiring for Senior Process Engineer jobs?

Cities in Missouri with the most Senior Process Engineer job openings:

Infographic showing various Senior Process Engineer job openings in Missouri as of August 2026, with employment types broken down into 1% As Needed, 82% Full Time, 14% Part Time, 2% Contract, and 1% Nights. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $113,607 per year, or $54.6 per hour.

Sr Process Engineer

Valero Energy

Louisiana, MO • On-site

$125 - $150/hr

Other

Medical, Retirement

Posted 6 days ago


Key responsibilities

  • Provide technical expertise to support process units for optimal refinery performance and daily operating targets.

  • Perform routine engineering calculations, monitor unit operating data, and assist in troubleshooting and evaluating unit operations.

  • Develop process designs, prepare reports, and support project development and implementation for refinery improvements.


Valero rating

6.2

Company rating: 6.2 out of 10

Based on 71 frontline employees who took The Breakroom Quiz

68th of 87 rated oil and gas companies


Job description

Job Description - Sr Process Engineer (26001AU)

Job Description

Sr Process Engineer - 26001AU

Description

Valero is the best-in-class producer of essential fuels and products that are foundational to modern life. We invite you to join our ~10,000 employees to drive exceptional results for our company, the energy industry and our community.

As a Sr Process Engineer you will provide senior-level engineering capability for process evaluation, optimization of refinery operations, project design, start-up, troubleshooting, and testing of units.Through the application of process engineering expertise, you will also provide the most optimum refinery performance that will meet the company’s safety, environmental, reliability and economic objectives.

At Valero, we are committed to advancing the future of energy through innovation, ingenuity and unmatched execution. You can help achieve this goal if you can:

  • Provide technical expertise to support process units for a particular area of the refinery to enable the most optimum performance that will meet daily operating targets and KPIs.
  • Perform all routine engineering calculations (i.e., piping hydraulics; PSV sizing; pump/motor sizing and evaluations; use process simulation software to evaluate complex problems, size/rate equipment, mass and energy balances; perform conversion calculations).
  • Monitor unit operating data. Ensure technical and operations management are aware of all current constraints.
  • Assist Operations in evaluations of unit operations and troubleshootingproblems.
  • Prepare and follow-up on reports on catalyst life, performance, regeneration, and requirements of the units.
  • Initiate proactive recommendations for improving unit yields and/or optimizing energy consumption.
  • Understand the refinery flows, heat and material balances, feeds, distillation processes and products.
  • Maintain and evaluate an informational database of operating history of units for all pertinent process variables and updates PFD's, P&ID's, and Unit Health Monitoring KPIs. Perform studies on the effects of operating variables on product quality, yield andprofitability.
  • Assist in supplying technical data in preparation of construction, operating, and environmental permit applications and reports.
  • Initiate and develop process design for new projects to address safety, environmental concerns, reliability, and other economic improvements to the unit.
  • Complete conceptual process studies/evaluations and determine the economic feasibility.Prepare project design basis document for the study. Develop lead case selection from an alternative analysis evaluation.
  • Complete process designs for proposed projects; write process specifications based on studies for problem solving, optimization, or new projects. These include process flow diagrams, heat and material balance, and P&IDs.
  • Prepare Decision Support Packages, Business Cases and assist in AFE preparation.
  • Develop and evaluate plans and criteria to execute a variety of projects.
  • Support T/A activities by participating in pre-TA planning scope reviews and project development, performing equipment inspections, assisting with catalyst loading, chemical cleaning applications and making necessary recommendations for corrections and or improvements for discovery items. Issue Post TA Report of significant findings and lessons learned.
  • Issue Monthly formal Unit Performance report, formal reports on specific subjects, informal discussions, attend Operations Line Team Meetings and a weekly Process Engineering Group meeting. Formal and informal presentations given to Senior Management team members.

This position is salaried exempt status, which means you are not eligible for overtime pay.

Qualifications

  • Able and willing to work on-site, in-person at the Valero St. Charles Refinery required.
  • Bachelor's or higher level degree in Chemical Engineering required.
  • Five (5) years of process engineering experience in a petroleum refinery required.
  • Process Simulation experience required.
  • Basic skill using Microsoft Office programs (i.e., Word and Excel) required

Preferred Requirements:

  • Experience in petroleum refining with multiple refinery process units preferred.

Need more reasons to work for a company that is both professionally challenging and culturally rewarding? Take a look at some of our best-in-class benefits:

  • Competitive Pay and Annual Bonus Program
  • 100% match on 401(K) up to 7%, with immediate vesting
  • Company-sponsored Pension Plan
  • Comprehensive Healthcare and Wellness Program

Benefits described above are highlights only, subject to an employee's eligibility and work location.

Discover more about St. Charles and how we're making a difference there.

All successful candidates must be eligible to obtain a TWIC card (Transportation Worker Identification Credential). It is Valero's policy that employees must wear this card at all times while working at the refinery. Please review eligibility criteria at https://www.tsa.gov/for-industry/twic .

Position level and salary will be commensurate with qualifications and experience.

Valero's employees and team-focused culture drive our success. We're invested in our dedicated workforce through a comprehensive, customizable benefits package, while supporting a caring culture that delivers a rewarding work environment built on teamwork, excellence and career growth. To explore the ways we build a stronger team, visit Valero.com/Careers .

Valero is an EEO Employer. All qualified applicants are encouraged to apply and will receive consideration for employment without regard to legally protected status, including race, color, religion, sex, national origin, age, disability, protected veteran or any other status protected by applicable federal, state or local laws.

Please be advised, if you are viewing this position on a website that lists an estimated salary rate/range, it was not provided by Valero. Valero's market specific salary rate/range will be provided during the recruiting process and tends to be higher than what is estimated by such websites.

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