Our Professionals


Len Miller is a pioneer in the environmental field as one of the first environmental lawyers in the U.S. government, working for the National Air Pollution Control Administration (NAPCA) and then as part of the group of federal employees who started the U.S. Environmental Protection Agency (EPA). While at the EPA, Len created the structures of the modern-day regulation of air and water pollution, and designed the framework for all of the EPA permit programs. He headed the national water enforcement effort and handled ground-breaking and controversial enforcement cases from Alaska to Idaho to the Caribbean
Len has advised Fortune 500 companies, start-up companies, trade associations, international Swiss bankers and venture capitalists. He has a particular interest in the settlement-first approach to conflict resolution, involving coalition formation, alternative dispute resolution and mediation. In recent years, Len has focused on matters under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA).


Len Miller spent 12 years at the U.S. EPA and its predecessor agency the National Air Pollution Control Administration. He helped create and build the structure still used for many of today’s federal rules governing air and water pollution, including the designation of Air Quality Control Regions, the National Pollutant Discharge Elimination System (water permits) and the procedures for water pollution enforcement. His work is memorialized in the regulations that still govern much of the operations of EPA permit issuance.

During his EPA tenure, Len was sent by the Agency to Seattle to open the EPA Region 10 office for the Pacific Northwest (Washington State, Oregon, Idaho and Alaska). He was the first Regional Air Pollution Control Director and later the Regional Enforcement Division Director.

In subsequent roles at EPA headquarters, Len was Deputy Assistant Administrator for Water Enforcement and Permits, where he headed up the nation’s water enforcement effort. He created the modern-day environmental permit system and set the policy on water discharges from all segments of U.S. industry and municipalities – a program heralded as one of the country’s most successful pollution reductions.

Since leaving government in 1980, Len has both represented some of the largest corporations in the world and championed startups. He has been particularly involved in representing new generic companies entering the U.S. agricultural chemical industry, assisting numerous pesticide companies from around the world to successfully secure U.S registrations and enter the U.S. market.

Len was selected as a 2015 Fellow at Harvard University’s Advanced Leadership Initiative, a year-long program for accomplished leaders at the top of their fields to re-engage with Harvard University and address national and global challenges.


  • Earth & Water Law, Partner, 2024-present
  • Sullivan and Worcester, Of Counsel, 2012-2014 and 2016-2024
  • Carter Ledyard & Milburn, Managing Partner, Washington, D.C. Office, 2008-2012
  • Bingham McCutcheon LLP, Partner; 2006-2008, (Swidler Berlin LLP merged into Bingham in 2006)
  • Swidler Berlin LLP, Founding Partner, 1982-2006
  • Leva, Hawes, Symington, Martin & Oppenheimer, Partner, 1981-1982
  • Preston Gates, Partner; Washington, D.C. Office; 1980-1981 
  • U.S. Environmental Protection Agency 
    • EPA Associate Deputy Assistant Administer for Water Enforcement and Permits; 1979-1980
    • EPA Permit Division Director; 1976 – 1979
    • EPA Region 10 Enforcement Division Director; 1972 – 1976
    • EPA Region 10 Air Pollution Control Director; 1970 -1972
    • Charter member of the EPA; Branch Chief, National Air Pollution Control Agency; 1968-1970
  • U.S. Public Health Service Commissioned Corps, Lieutenant Commander in the U.S. Public Health Service Commissioned Corps; 1968-1972


  • Brandeis University, B.A., cum laude
  • Harvard Law School, J.D.
  • Harvard Business School & the Kennedy School of Government, Certificate program for Senior Managers in Government
  • Harvard University Fellow, Advanced Leadership Initiative 


  • District of Columbia (active) 
  • Pennsylvania (inactive) 
  • Massachusetts (inactive)
  • Washington State (inactive)
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U. S. District Court for the District of Columbia 
  • U.S. District Court, Western District of Pennsylvania


  • “China’s Environmental Regulations and Industry Responses: What it Means for U.S. Companies” Technologies Conference and Training, International Trade Administration (“ITA”), July 15, 2014, Washington, DC
  • “Evaluating Hydraulic Fracturing from a ‘Tools of Government’ Perspective,” Johns Hopkins University Bloomberg School of Public Health, April 8, 2013 
  • “Business Opportunities for Chinese Pesticide Producers in the U.S. Market,” AgroChemex, October 2010, Shanghai, PRC
  • “Competition and Environmental Regulation in the U.S. Market, “British Crop Protection Council, November 1997, Brighton, England



  • Best Lawyers in America: for Environmental Law and for Litigation – Environmental, 2006 – 2024
  • Super Lawyers, 2006 – 2013
  • National Asphalt Pavement Association Industry Award
  • EPA Distinguished Career Award, 1980
  • U.S. Senior Executive Service, Charter Member, 1979
  • EPA Bronze Medal for Commendable Service for a Group, 1978
  • EPA Silver Medal for Superior Service, 1975
  • EPA Bronze Medal for Commendable Service, 1972
  • U.S. Public Health Service Commissioned Corps Commendation Medal, 1971


  • U.S. Environmental Protection Agency Alumni Association, First President and Co-Founder
  • Water Resources Action Project (WRAP), First President and Co-Founder


  • Product Risk Reduction in the Chemical Industry Executive Enterprises, 1985
  • NPDES Permit Handbook, 2nd edition, Government Institutes, 1992
  • Clean Water Handbook, 2nd edition, Government Institutes, 1997
  • Competition and Environmental Regulation in the U.S. Market, British Crop Protection Council, November 1997