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Senior Process Engineer Jobs in Rancho Cucamonga, CA

Worley

Principal Estimator

Monrovia, CA · On-site

Thorough technical, practical and leadership experience in the relevant discipline, including experience in project engineering and management with specialized estimating expertise. * An ...

DP World

Process Engineer

Rialto, CA · On-site

$91K - $112K/yr

As DP World launches its new facility in Rialto, CA, we're hiring Process Engineers at the Career or Senior levels to help design, optimize, and scale our operations from the ground up. In this role ...

syncreon

Process Engineer

Rialto, CA · On-site

$91K - $112K/yr

As DP World launches its new facility in Rialto, CA, we're hiring Process Engineers at the Career or Senior levels to help design, optimize, and scale our operations from the ground up. In this role ...

NAL Syncreon

Process Engineer

Rialto, CA

$91K - $112K/yr

As DP World launches its new facility in Rialto, CA, we're hiring Process Engineers at the Career or Senior levels to help design, optimize, and scale our operations from the ground up. In this role ...

Danone

Process Engineer

City Of Industry, CA · On-site

The Process Engineer is an entry level, onsite position based in a manufacturing facility, and part of the IWS Line Trio / Line Centric team. The Process Engineer is responsible for the equipment ...

Danone

Process Engineer

City Of Industry, CA · On-site

The Process Engineer is an entry level, onsite position based in a manufacturing facility, and part of the IWS Line Trio / Line Centric team. The Process Engineer is responsible for the equipment ...

Intertape Polymer Group (IPG)

Process Engineer

Corona, CA · On-site

$73K - $92K/yr

Process Engineer Department: Engineering Immediate Supervisor: Operations Manager Status: Exempt Salaried Position Purpose: Recommend improved processes, procedures, equipment, and materials which ...

Honor Plastics & Molding

Process Engineer

Pomona, CA

$85K/yr

The process engineer is responsible for maintaining daily production uptime of fully automated molding machines, including all subsequent pre- and post-mold operations such as trimming, insert ...

Honor Plastics & Molding

Process Engineer

Pomona, CA · On-site

$83K - $85K/yr

The process engineer is responsible for maintaining daily production uptime of fully automated molding machines, including all subsequent pre- and post-mold operations such as trimming, insert ...

Grainger Businesses

Process Engineer Lead

Mira Loma, CA

$95K - $158K/yr

Position Details The Process Engineer Lead - GUS leads the design, development, and execution of ... The position oversees large-scale projects, mentors senior engineers, and drives innovation through ...

Worley

Process Engineer Level II

Monrovia, CA · On-site

$110K - $162K/yr

Purpose: You will provide process engineering services and leadership projects to Worley' and its customers, including technical support and supervision within the process engineering team.

Hirekeyz Inc

Automation Process Engineer

Redlands, CA · On-site

Automation Process Engineer Location: Redland, CA - onsite Job Type: Full Time The Automation Process Engineer helps improve and scale factory automation. You'll work on developing and fixing factory ...

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All JobsProcess Engineer JobsSenior Process Engineer JobsSenior Process Engineer Jobs in Rancho Cucamonga, CA

Senior Process Engineer information

See Rancho Cucamonga, CA salary details

$76.6K

$123.8K

$174.2K

How much do senior process engineer jobs pay per year?

As of Jul 19, 2026, the average yearly pay for senior process engineer in Rancho Cucamonga, CA is $123,771.00, according to ZipRecruiter salary data. Most workers in this role earn between $106,300.00 and $137,400.00 per year, depending on experience, location, and employer.

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.

What are the key skills and qualifications needed to thrive as a Senior Process Engineer, and why are they important?

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 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 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 job categories do people searching Senior Process Engineer jobs in Rancho Cucamonga, CA look for? The top searched job categories for Senior Process Engineer jobs in Rancho Cucamonga, CA are:
What cities near Rancho Cucamonga, CA are hiring for Senior Process Engineer jobs? Cities near Rancho Cucamonga, CA with the most Senior Process Engineer job openings:
Senior Process Engineer jobs near you
Infographic showing various Senior Process Engineer job openings in Rancho Cucamonga, CA as of July 2026, with employment types broken down into 2% Locum Tenens, 88% Full Time, 8% Part Time, and 2% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $123,771 per year, or $59.5 per hour.
Principal Estimator

Principal Estimator

Worley

Monrovia, CA • On-site

Full-time

Posted 18 days ago

Worley rating

8.3

Company rating: 8.3 out of 10

Based on 30 frontline employees who took The Breakroom Quiz

103rd of 369 rated engineering

Job description

Building on our past. Ready for the future
Worley is a global professional services company of energy, chemicals and resources experts. We partner with customers to deliver projects and create value over the life of their assets. We're bridging two worlds, moving towards more sustainable energy sources, while helping to provide the energy, chemicals and resources needed now.
Responsibilities:
  • Ensure adherence to the preparation and/or supervision of cost estimates in accordance with the approved procedures during various project phases including Pre-FEED and FEED
  • Provide support in the development of estimating standards, procedures and systems for the estimating of tenders and proposals
  • Provide cost estimating guidance to projects
  • Work with the team to define an appropriate Work Breakdown Structure (WBS) in accordance with the customer and project requirement
  • Prepare the estimate plan to include establishment of the estimating methodology and cost estimating principles applicable to the estimate preparation.
  • Review design scope criteria and quantities for completeness and coordinate with the project to develop additional estimating bases when information is incomplete.
  • Support the collection, verification and integration across all work scope into the cost estimate
  • Provide support in identifying, analyzing, and providing innovative solutions to cost estimating problems.
  • Compare and analyze scope, quantities and cost data between projects. In comparison with previous estimates, outcome costs and vendor prices, carry out benchmark estimates through high level norms and industry standards\
  • Support the development of future benchmarking and estimating tools.
  • Develop escalation model where required and assist with the development of owners cost.
  • Coordinate identification of areas of risk in the compilation of cost estimates and evaluate appropriate levels of contingency. Where necessary perform Monte Carlo type risk analysis of costs estimates to determine contingency and accuracy levels.
  • Ensure sound quality of cost estimates adhering to the Worley Cost Estimating review procedures at varying project phases.
  • Prepare and present cost estimating information to management/customer. This may include the development of Basis of Cost Estimate report.
  • Participate in establishing pricing structures to be applied to quantities for estimates.
  • Prepare cost trend estimates in support of project cost trend programs.

Technical and Industry Experience:
  • Thorough technical and practical estimating skills and able to consistently deliver quality, accurate and timely work to Worley and its customers.
  • Knowledge of the fundamental requirements of the discipline, and the basic requirements of other disciplines
  • Knowledge of applicable local and international standards and statutory and regulatory requirements.
  • Highly competent in the use of relevant software such as MS Office Suite and discipline specific software and tools.
  • Thorough technical, practical and leadership experience in the relevant discipline, including experience in project engineering and management with specialized estimating expertise.
  • An understanding of project planning and scheduling experience and demonstrable leadership in working with a multi-disciplinary team in large scale projects.

Education, Qualifications, Accreditation, Training
Required:
  • A recognized degree in the relevant discipline or equivalent qualification/experience, ideally in Engineering or Construction Management.
  • Experience to include positions held in Project Controls, Commercial and Estimating Management positions and Construction site experience.

Moving forward together
We're committed to building a diverse, inclusive and respectful workplace where everyone feels they belong, can bring themselves, and are heard. We provide equal employment opportunities to all qualified applicants and employees without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by law.
We want our people to be energized and empowered to drive sustainable impact. So, our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation.
And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills, and supporting the transition of our workforce to become experts in today's low carbon energy infrastructure and technology.
Whatever your ambition, there's a path for you here. And there's no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change.

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