Atty. Mark Thompson
Mark Thompson counsels companies and trade associations on global compliance requirements applicable to finished foods, food additives, food packaging materials, cosmetics, industrial chemicals, and associated labeling in Asia, the United States (U.S.), and the European Union (EU). He also advises clients on the regulation of drugs and genetically modified organisms (GMOs) in Asia.
Animal and Veterinary Food and Drug & More Attorney · Serving Washington, DC
Profile Summary
About Mark Thompson at a Glance
Mark Thompson is a Partner based in Washington, District of Columbia, practicing at Keller and Heckman LLP. Their practice focuses on consumer, environmental, health care, and animal law. Educated at Catholic University of America (J.D., 2008) and University of Georgia (B.A., 2004). Active member of Memberships •District of Columbia Bar Association •Georgia State Bar Association. Serves clients in Washington, DC and the surrounding metropolitan area.
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About Mark Thompson
- Mark Thompson counsels companies and trade associations on global compliance requirements applicable to finished foods, food additives, food packaging materials, cosmetics, industrial chemicals, and associated labeling in Asia, the United States (U.S.), and the European Union (EU)
- He also advises clients on the regulation of drugs and genetically modified organisms (GMOs) in Asia
- Mark began his career at Keller and Heckman in the Washington, DC office
- From 2009 through 2016, he was based in the firm’s Shanghai Representative office, where he gained extensive experience and perspective on the regulatory scheme in China and throughout Asia
- During that time, he assisted foreign and domestic companies in evaluating and securing new clearances for products in China, Japan, Korea, Taiwan, Thailand, and other Asian countries
- Mark is the co-host of Food & Chemicals Unpacked, Keller and Heckman’s podcast regarding the legal and scientific issues surrounding the food, chemical, packaging, and related consumer product industries
- In addition, he is a contributing author to packaginglaw.com, which provides news and analysis of worldwide packaging regulations, and is frequently invited to speak at international regulatory conferences
- While in law school, Mark was a contract law teaching assistant and an Associate Editor for the Commlaw Conspectus
- These experiences enhance his practice by providing a deeper insight into contract law and policy matters, respectively
- Insights & In the News USA on Display: How 'Made in America' Claims Are Regulated 05.29.2026 Podcast Food & Chemicals Unpacked: Green Claims Games: A Challenge to California's SB 343 04.27.2026 Podcast Food & Chemicals Unpacked: Back in the PPWR: Revisiting the EU Framework for Packaging Su... 04.01.2026 Podcast Mark Thompson Quoted in Food Processing Article on Ultraprocessed Foods In The News 05.11.2026
Practice Areas Explained
Mark Thompson's Areas of Legal Practice
Each practice area below reflects the types of cases Mark Thompson handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
Consumer Protection in Washington
Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.
Mark Thompson is one of 50,226 consumer attorneys indexed nationally. Browse consumer attorneys in District of Columbia →
Environmental Law in Washington
Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.
Mark Thompson is one of 55,977 environmental attorneys indexed nationally. Browse environmental attorneys in District of Columbia →
Health Care Law in Washington
Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.
Mark Thompson is one of 66,157 health care attorneys indexed nationally. Browse health care attorneys in District of Columbia →
Animal Law in Washington
Animal law attorneys for pet custody, veterinary malpractice, animal welfare, and dangerous dog cases.
Mark Thompson is one of 5,091 animal law attorneys indexed nationally. Browse animal law attorneys in District of Columbia →
Jurisdictional Context
Why Local Counsel Matters in Washington
Practicing law in District of Columbia. Legal matters in District of Columbia are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Washington are typically filed in the local municipal court or the appropriate District of Columbia state district court, depending on subject matter and amount in controversy. An attorney licensed in District of Columbia brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in District of Columbia courts without local counsel or pro hac vice admission.
Washington Courts and Legal Process
Choosing a Washington-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.
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Professional Profile
Why Clients in Washington Choose Mark Thompson
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark Thompson's practice in the field of consumer, environmental, health care, and animal law.
Broad Practice Area Coverage
Covering consumer, environmental, and health care, Mark Thompson can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Washington
A Washington-based practice means Mark Thompson attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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Mark Thompson's Practice Areas & Specializations
Education & Law School Background
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