Atty. Gregory A. Clark
Greg Clark counsels clients on regulatory and environmental issues, focusing on the Toxic Substances Control Act (TSCA), the Clean Air Act (CAA), state volatile organic compound (VOC) and per- and polyfluoroalkyl (PFAS) regulations, the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), the Clean Water Act (CWA), and the Resource Conservation and Recovery Act (RCRA). Greg assists clients needing approval of new chemical substances, genetically modified organisms (GMOs), and pesticides under TSCA, FIFRA, and similar laws abroad.
Profile Summary
About Gregory A. Clark at a glance
Gregory A. Clark is a Partner based in Washington, District of Columbia, practicing at Keller and Heckman LLP. They have 16+ years of legal experience, licensed to practice since 2010. Their practice focuses on consumer, environmental, entertainment, and energy. Admitted to practice in Virginia District of Columbia (2010). Educated at University of Virginia (J.D., 2010) and James Madison University (B.S., 2005). Active member of ABA), Pesticide and Chemicals Committee, Vice Chair (2023 - 2024, Memberships •American Bar Association. Serands clients in Washington, DC and the surrounding metropolitan area.
Want to Get Service From This Attorney?
Sign up free and choose one of the two methods below.
Have a legal question? Sign up free, submit it through the Ask the Attorney module and receive a focused answer from a specialist.
- Free to ask a question
- Answers from specialist attorneys
- Optional private / anonymous question
Request an online video meeting or an in-person consultation at the attorney's office. Pick a time that works for you and share the details securely.
- Online video meeting
- In-person at the attorney's office
- Secure messaging and payment
About
- Greg Clark counsels clients on regulatory and environmental issues, focusing on the Toxic Substances Control Act (TSCA), the Clean Air Act (CAA), state volatile organic compound (VOC) and per- and polyfluoroalkyl (PFAS) regulations, the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), the Clean Water Act (CWA), and the Resource Conservation and Recovery Act (RCRA)
- Greg assists clients needing approval of new chemical substances, genetically modified organisms (GMOs), and pesticides under TSCA, FIFRA, and similar laws abroad
- Clients value his extensive experience guiding them through the Premanufacture Notification (PMN), Low Volume Exemption, Microbial Commercial Activity Notice (MCAN), and TSCA Environmental Release Application (TERA) review processes
- He also assists clients by negotiating the terms and conditions of TSCA Section 5(e) consent orders and Significant New Use Rules (SNURs)
- Additionally, Greg advises companies seeking to market biotechnology-derived products and their production platforms (including bacteria, yeast, algae, and plants) while navigating the complex regulatory requirements administered by the U.S
- Environmental Protection Agency (EPA), the U.S
- Food and Drug Administration (FDA), and the U.S
- Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS)
- Greg’s extensive background enables him to provide guidance to companies and trade associations on the prioritization, risk evaluation, and risk management of existing chemicals, including chemicals on the 2014 TSCA Work Plan, following the Lautenberg Act amendments to TSCA
- Through this work, he develops detailed comments and regularly interacts with EPA staff
- He assists companies with periodic reporting under the TSCA Chemical Data Reporting Rule and other agency reporting programs
- He also designs, conducts, and coordinates comprehensive internal audits of TSCA compliance for existing operations under EPA’s “Audit Policy,” as well as under other penalty mitigation policies
- Greg has in-depth knowledge representing clients in CAA rulemakings and enforcement matters before administrative agencies, including drafting highly technical comments, filing petitions for reconsideration and judicial review, and meeting with agency staff
- Greg has a background in molecular biology and emergency preparedness, offering him a unique foundation from which to advise his clients and assist the firm
- Awards •Best Lawyers: Ones to Watch in America: Environmental Law, 2024 - 2025 Insights & In the News EPA Takes Steps to Limit the Use of Certain PFAS 01.11.2024 Publication APHIS Extends Comment Period on Proposed Exemptions for Genetically Modified Plants 12.21.2023 Publication APHIS Proposes Five New Exemptions for Genetically Modified Plants 12.11.2023 Publication More Insights Best Law Firms Features Keller and Heckman in 2026 Edition Press Release 11.06.2025
Practice Areas Explained
Gregory A. Clark's Areas of Practice
Each practice area below reflects the types of cases Gregory A. Clark handles, with a brief overview of what that area of law covers.
Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.
Gregory A. Clark is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in District of Columbia →
Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.
Gregory A. Clark is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in District of Columbia →
Entertainment lawyers for music, film, sports contracts, talent representation, and IP licensing.
Gregory A. Clark is one of 45,946 entertainment attorneys indexed nationally. Browse entertainment attorneys in District of Columbia →
Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.
Gregory A. Clark is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in District of Columbia →
Jurisdictional Context
Why local counsel matters in District of Columbia
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 andnue, 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.
Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.
Frequently Asked
Common questions about Gregory A. Clark
Where is Gregory A. Clark's law office located?
What practice areas does Gregory A. Clark handle?
How long has Gregory A. Clark practiced law?
Where did Gregory A. Clark go to law school?
How can I contact Gregory A. Clark for a consultation?
Practice Areas
Education
Bar Admissions
Reviews
No reviews yet.