10 Marathon Petroleum finance leaders
Maria A. Khoury, Executive Vice President and Chief Financial Officer at Marathon Petroleum, is one of ten Marathon Petroleum finance leaders listed here, alongside people who hold vice president, senior director, director and head of business planning roles at the company. A reader can learn how finance leaders work at Marathon Petroleum from people who have held the role.
Professionals to explore
Brian Kreinbrink
LinkedInExperience: Director of Treasury and Financing Risk · Marathon Petroleum Corporation
Brian Kreinbrink has been Director of Treasury and Financing Risk at Marathon Petroleum Corporation since February 2023, based in Findlay, Ohio. Brian Kreinbrink was Finance Director, Commercial Operations (2021–2023) and Capital Analysis and Insurance Director (2019–2020) at Marathon Petroleum Corporation.
Erin Brzezinski
LinkedInExperience: Vice President & Controller · Marathon Petroleum Corporation
Erin Brzezinski has been Vice President & Controller at Marathon Petroleum Corporation since January 2024, based in Findlay, Ohio. Erin Brzezinski was Assistant Controller - MPC/MPLX Technical Accounting at Marathon Petroleum Corporation (2021–2024), Technical Accounting Manager at MPLX LP (2019–2021) and Director at PwC (2013–2019).
Kenan Kinsey
LinkedInExperience: Governance & Reporting Director · Marathon Petroleum Corporation
Kenan Kinsey has been Governance & Reporting Director at Marathon Petroleum Corporation since September 2026, based in the Toledo, Ohio area. Kenan Kinsey also lists a Strategic Finance Director role at Marathon Petroleum Corporation (since 2024) and was Supervisor, Investor Relations there (2023–2024).
Leanne Kelly
LinkedInExperience: Senior Director BP&A Finance · Marathon Petroleum Corporation
Leanne Kelly has been Senior Director BP&A Finance at Marathon Petroleum Corporation since June 2024, based in San Antonio. Leanne Kelly was Director BP&A Finance (2023–2024) and Assistant Controller, Refining & Marketing (2021–2023) at Marathon Petroleum Corporation.
Louie Rubiola
LinkedInExperience: VP, Business Financial Planning & Analysis · Marathon Petroleum Corporation
Louie Rubiola has been VP, Business Financial Planning & Analysis at Marathon Petroleum Corporation since October 2018, based in San Antonio. Louie Rubiola was VP, Business Process Redesign (2015–2018), VP, Optimization (2013–2015) and Senior Director, Investor Relations (2010–2013) at Andeavor.
Maria A. Khoury
LinkedInExperience: Executive Vice President and Chief Financial Officer · Marathon Petroleum
Maria A. Khoury has been Executive Vice President and Chief Financial Officer at Marathon Petroleum since January 2026, based in Houston. Maria A. Khoury was Group CFO, Biotechnology Platform at Danaher (2020–2026) and Chief Financial Officer of Cytiva at Cytiva (2020–2021).
Michelle Gaerke
LinkedInExperience: Director - Modeling & Analytics · Marathon Petroleum Corporation
Michelle Gaerke has been Director - Modeling & Analytics at Marathon Petroleum Corporation since September 2025, based in Findlay, Ohio. Michelle Gaerke was Strategic Finance Director (2024–2025) and Manager - Investment Analysis - Renewables (2022–2024) at Marathon Petroleum Corporation.
Miguel Vázquez Lorenzana
LinkedInExperience: Head Business Planning and Analysis LATAM · Marathon Petroleum Corporation
Miguel Vázquez Lorenzana has been Head Business Planning and Analysis LATAM at Marathon Petroleum Corporation since March 2026, based in the Mexico City area. Miguel Vázquez Lorenzana was Deputy Director Financial Planning and Analysis AMERICAS at HSBC (2022–2026) and Senior Manager Financial Planning & Supply Chain Lead Mexico at AbbVie (2020–2021).
Ryan Ciesla
LinkedInExperience: Director, Technical Accounting & Financial Reporting · Marathon Petroleum Corporation
Ryan Ciesla has been Director, Technical Accounting & Financial Reporting at Marathon Petroleum Corporation since April 2025, based in Naperville, Illinois. Ryan Ciesla was Principal, Technical Accounting at Marathon Petroleum Corporation (2024–2025) and Senior Manager, Global Technical Accounting at Walgreens Boots Alliance (2022–2024).
Thomas Siebenaller
LinkedInExperience: Director of MPLX Financial Modeling and Compliance · Marathon Petroleum Corporation
Thomas Siebenaller has been Director of MPLX Financial Modeling and Compliance at Marathon Petroleum Corporation since November 2025, based in Tiffin, Ohio. Thomas Siebenaller was Director of Corporate Planning and Support (2024–2025) and Investment Analysis Supervisor (2007–2025) at Marathon Petroleum Corporation.
Choose the right perspective
Match the person's area, such as business planning, accounting and reporting, treasury or financial modeling, to the decision you face. Weigh how long each person has held the role and how close their work sits to your question.
Questions to take into the conversation
- 01How did you run planning and forecasting for the area you supported?
- 02What did you learn about partnering with operating and commercial leaders on capital and spending decisions in your role?
- 03How did you decide which finance processes to standardize and which to leave to the teams you supported?
Reaching Marathon Petroleum finance leaders
How can I contact one of these Marathon Petroleum finance 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 2 companies: Marathon Petroleum Corporation and Marathon Petroleum, based on profile data retrieved on October 18, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Marathon Petroleum finance leaders?
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Can an AI agent ask one of these Marathon Petroleum finance 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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