10 CME Group legal leaders
Jonathan Marcus, Senior Managing Director and General Counsel at CME Group, is one of ten CME Group legal leaders on this page, with people who hold chief corporate counsel and associate general counsel roles across regulation, transactions, governance and technology. A reader can learn how legal leaders work at CME Group from people who have held the role.
Professionals to explore
Cam Hill
LinkedInExperience: Executive Director, Associate General Counsel · CME Group
Cam Hill has been Executive Director, Associate General Counsel at CME Group since December 2025 and describes deep experience guiding complex transactions and commercial initiatives. Cam Hill was Senior Corporate Counsel at Microsoft from 2024 to 2025, Principal Corporate Counsel at Microsoft from 2021 to 2024 and Commercial and M&A Counsel at ITW from 2019 to 2021.
Conor Weber
LinkedInExperience: Executive Director & Associate General Counsel · CME Group
Conor Weber has been Executive Director & Associate General Counsel at CME Group since June 2025 and was Senior Director & Associate General Counsel there from 2023 to 2025. Conor Weber was Director & Assistant General Counsel at CME Group from 2022 to 2023 and Assistant General Counsel & Vice President at Bank of America Merrill Lynch from 2017 to 2021.
Elizabeth Hensen
LinkedInExperience: Sr. Director, Associate General Counsel Corporate Governance · CME Group
Elizabeth Hensen has been Sr. Director, Associate General Counsel Corporate Governance at CME Group since February 2026. Elizabeth Hensen was Associate General Counsel, Securities at Allegion from 2025 to 2026, Assistant General Counsel at Exelon from 2018 to 2025 and Vice President, Deputy General Counsel & Assistant Secretary at Patriot National, Inc. from 2015 to 2017.
Heather Percival
LinkedInExperience: Senior Director and Associate General Counsel · CME Group
Heather Percival has been Senior Director and Associate General Counsel at CME Group since July 2026, based in Washington, D.C. Heather Percival was Senior Special Counsel at the U.S. Securities and Exchange Commission from 2025 to 2026 and Policy Counsel to the Chair at the SEC from 2022 to 2025.
Jaime Walsh
LinkedInExperience: Director & Associate General Counsel · CME Group
Jaime Walsh has been Director & Associate General Counsel at CME Group since June 2026, with a headline naming derivatives, regulatory and compliance, fintech and crypto work. Jaime Walsh was General Counsel at Apex Trader Funding from 2025 to 2026 and Head of Legal/Corporate Secretary at North American Derivatives Exchange (Nadex) from 2022 to 2023.
Joey Graves
LinkedInExperience: MD & Chief Corporate Counsel · CME Group
Joey Graves has been MD & Chief Corporate Counsel at CME Group since April 2025. Joey Graves was Deputy General Counsel at Hub Group from 2023 to 2025, Executive Director, Corporate Development at CME Group from 2022 to 2023 and Associate General Counsel - Transactions at CME Group from 2016 to 2022.
John McKinlay
LinkedInExperience: Executive Director & Associate General Counsel · CME Group
John McKinlay has been Executive Director & Associate General Counsel at CME Group since May 2025 and held the title Senior Director, Associate General Counsel there from 2022 to 2025. John McKinlay was Executive Principal & Associate General Counsel at OCC - The Options Clearing Corporation from 2021 to 2022 and Director, Assistant General Counsel at CME Group from 2016 to 2021.
Jonathan Marcus
LinkedInExperience: Senior Managing Director and General Counsel · CME Group
Jonathan Marcus has been Senior Managing Director and General Counsel at CME Group since October 2022. Jonathan Marcus was a Partner at Reed Smith LLP from 2021 to 2022, Of Counsel, Derivatives at Skadden, Arps, Slate, Meagher & Flom LLP from 2017 to 2021 and General Counsel at the U.S. Commodity Futures Trading Commission from 2013 to 2017.
Rachel Johnson
LinkedInExperience: Senior Director & Associate General Counsel · CME Group
Rachel Johnson has been Senior Director & Associate General Counsel at CME Group since June 2025, with a headline naming the regulatory practice. Rachel Johnson held CME Group roles as Director & Assistant General Counsel, Regulatory from 2021 to 2025, Senior Attorney from 2020 to 2021 and Senior Regulatory Staff Attorney from 2018 to 2020.
Youngmee Ko
LinkedInExperience: Executive Director, Associate General Counsel, Information Technology · CME Group
Youngmee Ko has been Executive Director, Associate General Counsel, Information Technology at CME Group since February 2023 and was Senior Director, Associate General Counsel Information Technology there from 2018 to 2023. Youngmee Ko was Vice President & Associate General Counsel at The Options Clearing Corporation from 2017 to 2018 and a Litigation Associate at Skadden from 2010 to 2017.
Choose the right perspective
Match the person to the legal area behind your question, since regulatory matters, corporate transactions, corporate governance and technology contracts each draw on different experience. Check when each person took the relevant role to judge how current their view is.
Questions to take into the conversation
- 01How is the legal team you work in organized across regulatory and business matters?
- 02What did you focus on first when you took on your current legal role?
- 03How do you work with regulators and business teams when a new product or rule is in play?
Reaching CME Group legal leaders
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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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