Chemical Process Engineer

Marathon Petroleum Company LP
Los Angeles, US
On-site

Job Description

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Chemical Process Engineer

Job Summary

The Los Angeles Marathon Refinery 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 schedules are a 9/80's or 4 days onsite/1 day remote. Must provide occasional after-hours support and support TAR approximately once a year.

Key Responsibilities

AREA 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 KPI’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 – 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

Skills & Requirements

Technical Skills

Process engineeringProcess optimizationProcess simulationControl system troubleshootingAdvanced control applicationsCatalyst managementEnvironmental complianceProject managementProcess documentationAlarm rationalizationPsm stewardshipMoc processCommunicationTeamworkProblem-solvingProactivityLeadershipChemical engineeringRefiningProcess control

Employment Type

FULL TIME

Level

mid

Posted

5/5/2026

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