10 Marathon Petroleum engineering leaders
Nick Homan, Senior Director - Asset Integrity & Reliability Engineering at Marathon Petroleum Corporation, is one of ten Marathon Petroleum engineering leaders here, alongside people who hold director of engineering and refining engineering director roles. A reader can learn how engineering leaders work at Marathon Petroleum from people who have held the role.
Professionals to explore
Bryan Hicks
LinkedInExperience: Director of Engineering · Marathon Petroleum Corporation
Bryan Hicks has been Director of Engineering at Marathon Petroleum Corporation since August 2025, a role the highlight places in Catlettsburg, Kentucky. At Marathon Petroleum, Bryan Hicks was also Director of Maintenance (2023–2025), Routine Maintenance Planning Manager (2021–2023), Construction Manager (2019–2021) and Engineering Manager (2017–2019).
Caleb Buchanan
LinkedInExperience: Engineering Director · Marathon Petroleum Corporation
Caleb Buchanan has been Engineering Director at Marathon Petroleum Corporation since February 2025, based in Martinez, California. At Marathon Petroleum, Caleb Buchanan was also Engineering Manager (2022–2025), Project Manager, Renewable Fuels (2020–2022) and Engineering Supervisor (2017–2020), all listed under the same company.
David Toohey
LinkedInExperience: Director of Engineering · Marathon Petroleum Corporation
David Toohey has been Director of Engineering at Marathon Petroleum Corporation since June 2025, based in La Palma, California, and was Engineering Manager there from December 2019 to June 2025. The highlight lists the current role in the Engineering and Technical department at director level, and the profile shows both roles at the same company.
Kerry Trombley, PE
LinkedInExperience: Director of Engineering · Marathon Petroleum Corporation
Kerry Trombley has been Director of Engineering at Marathon Petroleum Corporation since October 2025, a role the highlight describes as leading MPLX's Tank Integrity engineering and project management. At Marathon Petroleum, Kerry Trombley was also Senior Business Development Advisor - Renewables and Emerging Technology Strategy (2022–2025) and Engineering Supervisor - Above Ground Storage Tank Group (2018–2022).
Matt Mahler
LinkedInExperience: Corporate Reliability Director · Marathon Petroleum Corporation
Matt Mahler has been Corporate Reliability Director at Marathon Petroleum Corporation since January 2026, based in Detroit, Michigan. At Marathon Petroleum, Matt Mahler was also Maintenance Director - Galveston Bay Refinery (2023–2026), Maintenance Manager - Detroit Refinery (2019–2023) and Maintenance Planning Supervisor - Galveston Bay Refinery (2016–2019).
Michelle Dougherty
LinkedInExperience: Director of Engineering · Marathon Petroleum Corporation
Michelle Dougherty has been Director of Engineering at Marathon Petroleum Corporation since February 2026, a role the highlight describes as managing teams responsible for process engineering for new assets and major asset revisions. At Marathon Petroleum, Michelle Dougherty was also Process Engineering Senior Manager (from 2022), Operational Excellence Coordinator (2017–2022) and Engineering Manager (2016–2017).
Nick Glockner
LinkedInExperience: Refining Engineering Director · Marathon Petroleum Corporation
Nick Glockner has been Refining Engineering Director at Marathon Petroleum Corporation since March 2026, based in Wheelersburg, Ohio. At Marathon Petroleum, Nick Glockner was also Refining Engineering Manager (2025–2026) and Refining Engineering Supervisor (2019–2025), and the profile lists Plant Engineer at SunCoke Energy (2010–2019) and Senior Project Engineer at Sunoco Refining & Marketing (2008–2010).
Nick Homan
LinkedInExperience: Senior Director - Asset Integrity & Reliability Engineering · Marathon Petroleum Corporation
Nick Homan has been Senior Director - Asset Integrity & Reliability Engineering at Marathon Petroleum Corporation since August 2016, based in Findlay, Ohio. At Marathon Petroleum, Nick Homan was also Commercial Development Manager (2013–2016), Terminal Operations Area Manger (2012–2013), Pipeline Project Manager (2011) and Pipeline Crude Oil Movements Supervisor (2008–2011).
Paul Hansen P.E.
LinkedInExperience: Director- Engineering & Major Projects at Marathon Petroleum - Louisiana Refining Division · Marathon Petroleum Corporation
Paul Hansen has been Director- Engineering & Major Projects at Marathon Petroleum - Louisiana Refining Division at Marathon Petroleum Corporation since March 2025, based in Metairie, Louisiana. At Marathon Petroleum, Paul Hansen was also Engineering & Major Projects Manager (2021–2025), Major Projects Manager (2020–2021) and Turnaround Manager (2011–2020).
Robert Ganter
LinkedInExperience: Engineering Director - MPLX G&P Facilities · Marathon Petroleum Corporation
Robert Ganter has been Engineering Director - MPLX G&P Facilities at Marathon Petroleum Corporation since October 2018, based in Pittsburgh, Pennsylvania. The profile also lists Vice President of Engineering - North East Business Unit (2017–2018), Director Engineering - Plant Construction - North East Business Unit (2017) and Senior Engineering Manager (2013–2016) at MarkWest Energy Partners, L.P.
Choose the right perspective
Pick the person whose site and engineering area, such as process, reliability, tank integrity or major projects, match the decision you are working through. Check how long each person has held the current role, since a recent appointee and a long-serving director will describe the same work differently.
Questions to take into the conversation
- 01How did you set priorities for your engineering team when maintenance, projects and day-to-day support all needed attention?
- 02What changed in your work when you moved from a manager role into a director role?
- 03How did you decide when a reliability or integrity issue needed a larger project rather than a repair?
Reaching Marathon Petroleum engineering leaders
How can I contact one of these Marathon Petroleum engineering leaders?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 1 company: Marathon Petroleum Corporation, based on profile data retrieved on October 17, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Marathon Petroleum engineering leaders?
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What if they don't reply?
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Can an AI agent ask one of these Marathon Petroleum engineering leaders a question?
Yes. An agent with a USDC wallet on Base can ask one question without an Instant Expert account. It names the person, for example by the LinkedIn URL on this page, and pays per ask over x402 (HTTP 402). The person answers in writing or by voice note, and if nobody answers within 7 days, the payment goes back to the wallet automatically. Claude and ChatGPT can do the same through the Instant Expert connector: setup is at /docs/mcp for Claude and /docs/chatgpt for ChatGPT. x402 docs
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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