10 ADM government affairs leaders
Vice President, Global Government Affairs, Vice President, Federal Government Relations and Senior Director, State Government Relations are among the current titles held by these ADM government affairs leaders. A reader can learn how government affairs leaders work at ADM from people who have held the role.
Professionals to explore
beth holzman
LinkedInExperience: Director, Government Relations · ADM
beth holzman has been Director, Government Relations at ADM since 1986, based in Washington, D.C., and the profile headline gives the title as Director, Government Relations at Archer Daniels Midland Company. The profile lists this ADM role with no end date.
Bryan Dierlam
LinkedInExperience: Director, Government Relations · ADM
Bryan Dierlam has been Director, Government Relations at ADM since November 2015, based in Washington, D.C. Bryan Dierlam was Director, Federal Government Affairs at Cargill (2009 to 2015), Senior Professional Staff at the House Committee on Agriculture (2005 to 2009) and Executive Director, Government Affairs at the National Cattlemen's Beef Association (1999 to 2005).
Camilla Liput
LinkedInExperience: Director of EMEA Government Relations · ADM
Camilla Liput has been Director of EMEA Government Relations at ADM since September 2024, based in the Brussels area. Camilla Liput was Lead EMEA Public Affairs Seeds & Traits - Bayer Crop Science (2020 to 2024), Global Manager Regulatory Policies & Messaging (2017 to 2019) and EU Regulatory Affairs Manager Seeds & Traits (2013 to 2017) at Bayer.
Connor Hamburg
LinkedInExperience: Senior Director, Global Government Relations · ADM
Connor Hamburg has been Senior Director, Global Government Relations at ADM since September 2026, based in Washington, D.C. Connor Hamburg was Senior Manager (2025 to 2026) and Manager (2021 to 2025), Government & Industry Affairs at Nutrien, and Director of Government Affairs at the Renewable Fuels Association (2018 to 2021).
Gregory Webb
LinkedInExperience: VP - State Government Relations · Archer Daniels Midland
Gregory Webb has been VP - State Government Relations at Archer Daniels Midland since 2008, based in Decatur, Illinois, and the profile lists the same VP - State Government Relations title at ADM with no end date. The profile headline reads VP - State Government Relations at Archer Daniels Midland Company.
Haochen Xiong
LinkedInExperience: Senior Director of Government Relations, Asia-Pacific · ADM
Haochen Xiong has been Senior Director of Government Relations, Asia-Pacific at ADM since October 2021, based in Beijing. At ADM, Haochen Xiong was also China Director, Governemnt Relations (2017 to 2021) and Government Relations Manager (2011 to 2017), and was a Consultant, Investment and Government Relations at APCO (2008 to 2010).
Maria Pica Karp
LinkedInExperience: Vice President, Global Government Affairs · ADM
Maria Pica Karp has been Vice President, Global Government Affairs at ADM since May 2022, based in Washington, D.C. Maria Pica Karp was Executive Advisor, Corporate Affairs (2020 to 2022), Vice President and General Manager, Government Affairs (2013 to 2020) and General Manager, Upstream and Gas Public & Gov't Affairs (2011 to 2012) at Chevron.
Matt O'Mara
LinkedInExperience: Senior Director, International Government Relations · ADM
Matt O'Mara has been Senior Director, International Government Relations at ADM since March 2022, based in Washington, D.C. Matt O'Mara was Vice President, International Affairs (2017 to 2022) and Managing Director, Food and Agriculture (2014 to 2016) at the Biotechnology Innovation Organization.
Rachel Geilenfeld, JD MBA
LinkedInExperience: Senior Director, State Government Relations · ADM
Rachel Geilenfeld has been Senior Director, State Government Relations at ADM since June 2025, based in Ankeny, Iowa. Rachel Geilenfeld was Policy Advisor at Renewable Energy Group for Chevron (2022 to 2025) and External Relations Manager at Sukup Manufacturing Co. (2017 to 2021).
Trevor Reuschel
LinkedInExperience: Vice President, Federal Government Relations · ADM
Trevor Reuschel has been Vice President, Federal Government Relations at ADM since November 2024, based in Arlington, Virginia. Trevor Reuschel was Director, Office of Congressional and Public Affairs at the Farm Credit Administration (2023 to 2024) and Chief of Staff in the Office of Cheri Bustos at the U.S. House of Representatives (2020 to 2023).
Choose the right perspective
Pick a person whose own title covers the same ground as your question, such as U.S. federal or state relations, international relations or a region such as EMEA or Asia-Pacific. Use the dates on each role to favor someone whose time in it overlaps the period you care about.
Questions to take into the conversation
- 01What did a typical week look like in your government relations role, and which work took the most time?
- 02How do you work with business leaders inside the company when an issue affects their operations?
- 03What did you have to learn when you moved into a company government relations role from government, an association or another employer?
Reaching ADM government affairs leaders
How can I contact one of these ADM government affairs 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: ADM and Archer Daniels Midland, based on profile data retrieved on October 21, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach ADM government affairs leaders?
You choose the offer, starting at $5 per person. The offer is what the person receives, and Instant Expert's fee is added on top, so a $100 offer costs you $125. The fee is 20% of what you pay. You're charged only when the person books the call or sends the answer.
What if they don't reply?
You pay nothing. Instant Expert sends follow-up reminders, and if the person hasn't booked or answered within 7 days, the request expires and any hold on your card is released. You can invite several of the 10 people on this list at once and cap your total spend, so you pay only for the ones who accept.
Can an AI agent ask one of these ADM government affairs 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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