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Assistant Process Engineer Jobs in Brea, CA (NOW HIRING)

Chemical Process Engineer

Carson, CA ยท On-site

$107 - $184/hr

Chemical Process Engineer - Must have Gas/Oil Refinery Experience Job Summary The Los Angeles ... Communicate unit performance, optimization opportunities, and environmental performance. * Assist ...

... Assist with Lean and continuous improvement projects โ€ข Help develop and implement improved work ... process engineering experience โ€ข Direct experience working on a manufacturing floor โ€ข ...

... Assist with Lean and continuous improvement projects โ— Help develop and implement improved work ... process engineering experience โ— Direct experience working on a manufacturing floor โ— ...

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Assistant Process Engineer information

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How much do assistant process engineer jobs pay per hour?

As of Sep 2, 2026, the average hourly pay for assistant process engineer in Brea, CA is $26.39, according to ZipRecruiter salary data. Most workers in this role earn between $18.17 and $30.62 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as an assistant process engineer?

To thrive as an Assistant Process Engineer, a solid background in chemical or process engineering, analytical problem-solving skills, and a relevant engineering degree are essential. Familiarity with process simulation software (such as Aspen HYSYS or AutoCAD), data analysis tools, and safety regulations is typically required. Strong teamwork, effective communication, and attention to detail help individuals stand out in this role. These skills and qualities ensure efficient process optimization, safe operations, and successful collaboration within engineering teams.

What are some common challenges faced by assistant process engineers, and how can they effectively overcome them?

Assistant Process Engineers often encounter challenges such as adapting to rapidly changing project requirements, troubleshooting unexpected process inefficiencies, and balancing multiple tasks under tight deadlines. To navigate these obstacles, it's important to develop strong problem-solving skills, maintain clear communication with senior engineers and cross-functional teams, and stay organized through effective time management. Proactively seeking feedback and learning from experienced colleagues can also help in building confidence and technical expertise, paving the way for career progression.

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

AspectAssistant Process EngineerProcess Engineer
QualificationsBachelor's in Engineering or related field, some certificationsBachelor's or higher in Engineering, often with more experience
Work EnvironmentSupportive, entry-level, team-basedMore autonomous, project management responsibilities
ResponsibilitiesAssist in process design, data collection, troubleshootingDesign, optimize, and oversee manufacturing processes

Assistant Process Engineers typically support process development and troubleshooting under supervision, while Process Engineers take on more independent responsibilities in designing and optimizing processes. Both roles require similar educational backgrounds, but Process Engineers usually have more experience and autonomy in their tasks.

How much does an assistant process engineer get paid?

The average salary for an assistant process engineer typically ranges from $50,000 to $70,000 per year, depending on experience, location, and industry. Entry-level positions may start lower, while those with specialized skills or certifications can earn higher wages. Benefits often include health insurance, paid time off, and opportunities for professional development.

What does an assistant process engineer do?

An assistant process engineer supports the development, implementation, and optimization of manufacturing or chemical processes. They assist in data collection, process troubleshooting, and ensuring safety and quality standards are met, often using tools like process simulation software. This role typically requires strong analytical skills and knowledge of engineering principles.

What are the most commonly searched types of Process Engineer jobs in Brea, CA?

The most popular types of Process Engineer jobs in Brea, CA are:

What are popular job titles related to Assistant Process Engineer jobs in Brea, CA?

For Assistant Process Engineer jobs in Brea, CA, the most frequently searched job titles are:

What job categories do people searching Assistant Process Engineer jobs in Brea, CA look for?

The top searched job categories for Assistant Process Engineer jobs in Brea, CA are:

What cities near Brea, CA are hiring for Assistant Process Engineer jobs?

Cities near Brea, CA with the most Assistant Process Engineer job openings:

Chemical Process Engineer

drive for MPC

Carson, CA โ€ข On-site

$107 - $184/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted 9 days ago


Job description

An exciting career awaits you At MPC, we're committed to being a great place to work - one that welcomes new ideas, encourages diverse perspectives, develops our people, and fosters a collaborative team environment. Chemical Process Engineer - Must have Gas/Oil Refinery Experience

Job Summary The Los Angeles Marathon Refinery located in Carson, California has an opening for an experienced Chemical Process Engineer who will provide technical support for plant operations. They will be assigned a specific unit or units within the Refinery with responsibilities of daily monitoring and troubleshooting of their areas, process optimization, and design and development of capital projects as well as major modifications to existing units. Process Engineers will apply state-of-the-art technology with regard to process simulation and optimization, recommend programs and procedures to increase the economic efficiency of refining operations, and work in a team environment with line operators and other engineers to maintain and troubleshoot control system problems as well as develop advanced control applications for their process units. Available onsite schedule is a 9/80's. Must provide occasional after-hours support and support TAR approximately once a year.

Key ResponsibilitiesAREA TEAM SUPPORT
  • Communicate unit performance, optimization opportunities, and environmental performance.
  • Assist troubleshooting efforts with unit upsets, product quality incidents, not meeting production plans, etc.
  • Support Small to medium capital project process engineering.
  • Monitors process performance and identifies opportunities for improving yield, energy efficiency, and reliability.
  • May plan test runs and recommends projects to address opportunities.
  • Maintain current work lists with priorities.
  • Support Key Performance Indicators (KPI) included as part of routine reporting (WABT curve, fouling, chemical and catalyst budgets, yields, etc.)
  • Manage catalyst performance and coordinate catalyst change timing
  • Support unit operation within environmental limits.
  • Assists in planning and executing turnarounds/outages, including scope development and post-event evaluations
  • Support and review operations procedures for start-up and shutdown.
  • Review and approve vendor chemical programs.
  • Inspect vessel internals for proper installation and tolerances of components
  • Monitor and approve catalyst loading
  • Publish recommendation memos and turnaround reports
  • Maintains and updates process documentation.
  • Troubleshoots and maintains unit mass balance within tolerance.
  • Interact and communicate with Board Operators daily.
  • Participate in Alarm rationalization.
  • Understand controls logic and any Advanced Process Controls (APC) Support inclusive of energy, water, and tank farm systems
  • Supports collaboration with operations, engineering, and maintenance teams to resolve operational challenges.
  • Develops and maintains relationships with console and field operators.
PROJECT PROCESS LEADERSHIP
  • Work with Area Team to develop project ideas and submit project request forms (PRF) with a memo detailing economic benefits and justification
  • Work with process controls group to develop / implement APC
  • Provide process design basis
PROCESS OPTIMIZATION
  • Review unit KPIโ€™s for the month and include analyses when appropriate with supporting data.
  • Include unit performance on key economic drivers.
  • Include recommendations for performance and reliability improvements and compliance with environmental permits.
  • Participate, attend and present in Advisory Group Calls and Face to Face Technology Meetings.
  • Schedule reviews with vendors and Technologists.
  • Work with Technologists to understand and implement unit best practices.
  • Set outside feedstock properties and discuss opportunity feeds with Product Control.
  • Know and understand the process fully to identify constraints.
  • Work with Product Control for setting appropriate unit targets.
  • Monitor and optimize Unit yield.
  • Participate as key decision maker for selecting programs, catalyst loads, etc.
  • Communicate with Product Control and other relevant groups regarding: Catalyst budget curves / current performance Operation against / changing process constraints Unit actual yields vs Linear Programming (LP) model yields โ€“ monitor accuracy of LP yields Understand Product Control targets and ensure proper implementation / understanding by Operations Support Product Control on required rigorous model runs as necessary
TECHNICAL PSM STEWARDSHIP
  • Support Critical Process Variables and Not to Exceed (CPV/NTE) Maintenance and Operating Limits.
  • Lead and Participate in the MOC (Management of Change) process.
  • Perform environmental calculations (leaks, maximum intended inventory, etc.)
  • Lead Incident Investigations for process related events.
  • Participates in hazard evaluations, incident investigations, and management of change.
  • Support instrumentation Process Safety Information (PSI) and troubleshooting (thermowell calculations, orifices, etc.).
  • Provide and approve special chemical procedures.
Education, Experience and Skills Minimum Qualifications:
  • Must have a Bachelorโ€™s degree in Chemical Engineering discipline. (Education must be obtained/completed prior to start date)
  • Must have a minimum of 5 years as a Chemical/Process Engineer in the oil/gas refining industry.
  • Must be proficient in Microsoft: Word, Excel and Outlook.
  • Must be able to wear appropriate PPE in the refinery (respirator), be able to physically perform all tasks in the field and take hair drug test and physical.
  • Must have a clean and valid driverโ€™s license.
  • Must be legally authorized to work in the US without the need for future VISA sponsorship.
  • Travel Requirement is 5% or less.
  • Must be able to work: the onsite 9/80's schedule with the ability to provide occasional after-hours support and support TAR approximately once a year.

****Relocation may be available.**** This position belongs to a family of jobs with increasing responsibility, competency and skill level. Actual position title and pay grade will be based on the selected candidateโ€™s experience and qualifications. Learn more about Marathon Petroleumโ€™s benefits at www.mympcbenefits.com. As an energy industry leader, our career opportunities fuel personal and professional growth.

Location: Carson, California

Job Requisition ID: 00023386

Pay Min/Max: $106,900.00 - $184,300.00

Salary Grade: 11 - 12

Location Address: 2350 E 223rd St

Additional locations: Wilmington, California

Education: Bachelors (Required)

Employee Group: Full time

Employee Subgroup: Regular

Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision-making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws.

If you would like more information about your EEO rights as an applicant, click here.

If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at talentacquisition@marathonpetroleum.com.

A Human Resources representative will review your request and contact you to discuss a reasonable accommodation.

  • Marathon Petroleum offers a total rewards program which includes, but is not limited to, access to health, vision, and dental insurance, paid time off, 401k matching program, paid parental leave, and educational reimbursement.
  • The hired candidate will also be eligible for a discretionary company-sponsored annual bonus program.

Equal Opportunity Employer: Veteran / Disability

We will consider all qualified Applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws. In reviewing criminal history in connection with a conditional offer of employment, Marathon will consider the key responsibilities of the role.

About Marathon Petroleum Corporation Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets. MPC also owns the general partner and majority limited partner interest in MPLX LP, a midstream company that owns and operates gathering, processing, and fractionation assets, as well as crude oil and light product transportation and logistics infrastructure.

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