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Refinery Process Engineer Jobs (NOW HIRING)

Cvr Energy, Inc.

Process Engineer II

Wynnewood, OK · On-site

EXPERIENCE REQUIREMENTS * 2+ years of experience in oil refinery process engineering or operations ... required * Experience with capital and operating cost estimating and economic analysis is preferred

CVR Energy, Inc.

Process Engineer II

Wynnewood, OK · On-site

EXPERIENCE REQUIREMENTS * 2+ years of experience in oil refinery process engineering or operations ... required * Experience with capital and operating cost estimating and economic analysis is preferred

Delek US

Sr Process Engineer

Krotz Springs, LA · On-site

$84K - $108K/yr

Our refineries in Texas, Arkansas, and Louisiana have a combined crude capacity of 302,000 barrels ... JOB SUMMARY The process engineer uses understanding of process fundamentals, process equipment ...

Delek US

Sr Process Engineer

Krotz Springs, LA · On-site

$84K - $108K/yr

Our refineries in Texas, Arkansas, and Louisiana have a combined crude capacity of 302,000 barrels ... JOB SUMMARY The process engineer uses understanding of process fundamentals, process equipment ...

Clean Harbors

Water Process Engineer

Deer Park, TX · On-site

$159K/yr

The Water Process Engineer implements and oversees compliance programs for Water treatment ... Candidate must have experience working with process water treatment in refineries, chemical plants ...

HF Sinclair

Process Engineer

Artesia, NM

Basic Function HF Sinclair is seeking for a process engineer to conducts engineering assignments ... Refinery or Petrochemical industry experience preferred. FCC, CCR, Alky, Sulfur unit, Delayed ...

HF Sinclair

Process Engineer

Artesia, NM · On-site

Basic Function HF Sinclair is seeking for a process engineer to conducts engineering assignments ... Refinery or Petrochemical industry experience preferred. FCC, CCR, Alky, Sulfur unit, Delayed ...

HF Sinclair

Process Engineer

Artesia, NM

Basic Function HF Sinclair is seeking for a process engineer to conducts engineering assignments ... Refinery or Petrochemical industry experience preferred. FCC, CCR, Alky, Sulfur unit, Delayed ...

HollyFrontier

Process Engineer

Artesia, NM

Basic Function HF Sinclair is seeking for a process engineer to conducts engineering assignments ... Refinery or Petrochemical industry experience preferred. FCC, CCR, Alky, Sulfur unit, Delayed ...

Eichleay, Inc.

Process Engineer

Ferndale, WA · On-site

$75K/yr

This Process Engineering role is ideal for engineers looking to gain hands-on experience in refinery, oil & gas, and industrial process environments while building a strong technical foundation in a ...

Eichleay, Inc

Process Engineer

Ferndale, WA

$75K/yr

This Process Engineering role is ideal for engineers looking to gain hands-on experience in refinery, oil & gas, and industrial process environments while building a strong technical foundation in a ...

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All JobsRefinery Process Engineer Jobs

Refinery Process Engineer information

See salary details

$71.5K

$137.4K

$233K

How much do refinery process engineer jobs pay per year?

As of Jun 30, 2026, the average yearly pay for refinery process engineer in the United States is $137,385.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,500.00 and $147,500.00 per year, depending on experience, location, and employer.

What does a Refinery Process Engineer do?

A Refinery Process Engineer is responsible for designing, optimizing, and troubleshooting processes within an oil refinery to ensure efficiency, safety, and regulatory compliance. They analyze data, monitor equipment performance, and recommend improvements to enhance productivity and reduce costs. Additionally, they work closely with operations, maintenance, and safety teams to implement process modifications and resolve technical issues. Their role is crucial in maximizing yield, minimizing energy consumption, and ensuring environmental compliance.

What engineers make $300,000 a year?

Senior engineers in specialized fields such as petroleum, aerospace, or software engineering can earn $300,000 or more annually, especially with extensive experience, advanced skills, and leadership roles. High-level positions often require advanced degrees, certifications, and a strong track record of project management or technical expertise.

What are some of the typical day-to-day responsibilities for a Refinery Process Engineer?

As a Refinery Process Engineer, your main responsibilities typically include monitoring and optimizing production processes, troubleshooting technical issues, and ensuring compliance with safety and environmental regulations. You may also be involved in analyzing process data, implementing improvements, and coordinating with operations, maintenance, and other engineering teams to maintain efficient plant performance. Your day could involve both desk work—such as process modeling and reporting—and fieldwork in the refinery, observing equipment and working closely with plant personnel. This blend of tasks helps ensure the refinery operates safely, efficiently, and at peak capacity.

What are the key skills and qualifications needed to thrive in the Refinery Process Engineer position, and why are they important?

To excel as a Refinery Process Engineer, a strong background in chemical engineering, process optimization, and safety protocols is essential, typically supported by a relevant engineering degree. Proficiency with process simulation software (such as Aspen HYSYS or CHEMCAD), knowledge of distributed control systems (DCS), and familiarity with industry certifications like Six Sigma or Professional Engineer (PE) licensure are highly valued. Problem-solving abilities, strong communication, and teamwork skills help professionals navigate dynamic refinery environments and coordinate with cross-functional teams. These competencies are crucial for ensuring efficient, safe, and compliant operations within complex refinery processes.

What engineer makes $500,000 a year?

Refinery process engineers typically do not earn $500,000 annually; such high salaries are more common in executive roles or specialized senior positions within the oil and gas industry. Top-level engineers with extensive experience, advanced certifications, or leadership responsibilities may approach high six-figure incomes, but salaries of $500,000 are rare for standard process engineering roles.

What does a process engineer do in a refinery?

A refinery process engineer designs, develops, and optimizes chemical processes used to convert crude oil into refined products like gasoline, diesel, and jet fuel. They analyze process data, troubleshoot operational issues, and ensure safety and efficiency using tools such as process simulation software. The role often requires knowledge of chemical engineering principles, safety standards, and certifications like API or OSHA compliance.

What does a refinery engineer do?

A refinery process engineer designs, monitors, and optimizes the processes used to convert crude oil into refined products like gasoline, diesel, and jet fuel. They analyze process data, troubleshoot operational issues, and ensure safety and efficiency using tools such as process simulation software. Strong knowledge of chemical engineering principles and safety standards is essential in this role.
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Refinery Process Engineer jobs near you
Infographic showing various Refinery Process Engineer job openings in the United States as of June 2026, with employment types broken down into 100% Full Time. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $137,385 per year, or $66.1 per hour.

Hydrometallurgical Process Engineer

Mariana Minerals

Houston, TX • On-site

$100K - $175K/yr

Full-time

Posted 27 days ago

Key responsibilities

  • Lead hydrometallurgical process equipment scopes from concept development and modeling validation through procurement, detailed engineering, fabrication, installation, commissioning, and ramp-up.

  • Develop detailed heat and material balances for complex hydrometallurgical process trains, including leaching, solution purification, solvent extraction/ion exchange, precipitation, crystallization, and residue handling.

  • Collaborate with R&D, lab staff, pilot-plant engineers, and operations teams to translate bench-scale insights into robust and scalable hydrometallurgical flowsheets.

Job description

About Mariana Minerals
Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies.
We're reimagining how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply.
The Role
Mariana Minerals is looking for a highly motivated Hydrometallurgical Process Engineer to work on building the critical minerals supply chain to support the world's energy transition.
As a Hydrometallurgical Process Engineer at Mariana Minerals, you will lead the development and deployment of first-of-its-kind chemical refining processes, while also supporting development of software for capital project execution and automated plant optimization. Responsibilities will include leading equipment scopes from concept through to design, installation, commissioning, ramp, and handover to the operations team.
What You'll Do
  • Lead hydrometallurgical process equipment scopes from concept development and modeling validation through procurement, detailed engineering, fabrication, installation, commissioning, and ramp-up
  • Manage external technology licensors, equipment vendors, and engineering partners to deliver fully integrated and performant hydrometallurgical refining systems
  • Develop detailed heat and material balances for complex hydrometallurgical process trains, including leaching, solution purification, solvent extraction/ion exchange, precipitation, crystallization, and residue handling
  • Build hydraulic models and process flow diagrams/P&IDs for hydrometallurgical circuits, ensuring operability, reliability, and safety
  • Create first-principles models of chemical reactors and unit operations (e.g., leach reactors, autoclaves, SX settlers, IX columns, precipitation reactors, filtration systems) to validate scale-up and derisk commercial designs
  • Identify, evaluate, and implement engineering solutions to optimize extraction, purification, and recovery processes under varying chemistry, feedstock qualities, and operating conditions
  • Collaborate deeply with R&D, lab staff, pilot-plant engineers, and operations teams to translate bench-scale insights into robust and scalable hydrometallurgical flowsheets
  • Work closely with software and machine-learning teams to automate process-engineering workflows and develop advanced control, optimization, and digital-twin models for hydrometallurgical reactors and plants
What You'll Bring
  • Strong understanding of engineering fundamentals and demonstrated ability to leverage the understanding to solve challenging problems
  • Strong foundation in chemical engineering, metallurgical engineering, or process engineering, with demonstrated ability to apply engineering fundamentals to complex hydrometallurgical systems
  • Experience with equipment engineering and design. Including but not limited to:
  • Brownfield modifications and upgrades of process equipment (e.g., leach tanks, reactors, filtration systems, solvent extraction circuits)
  • Greenfield design of hydrometallurgical unit operations and integrated circuits
  • Troubleshooting, evaluation, and optimization of operating hydrometallurgical or chemical-process equipment
  • Experience with the following industries and/or production environments:
  • Hydrometallurgical mineral processing or metal refining
  • Large-scale mining, critical-minerals processing, or battery-materials production
  • Industrial chemical manufacturing with complex aqueous/chemical reaction systems
  • Engineering, procurement, and construction (EPC/EPCM) firms supporting mining and mineral processing industry projects

Why Join Us?
At Mariana Minerals, you'll be part of a mission-driven team reshaping the way critical minerals are sourced and supplied globally. You'll have the autonomy to make big decisions, the tools to innovate, and a culture that values ownership, smart automation, and collaboration.
Our culture is built on three principles:
Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale.
Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply.
Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.

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