• A.B. cum laude, Brandeis University
  • J.D., Harvard Law School
  • Certificate, Program for Senior Managers in Government, Harvard Business School

Memberships and citations

  • Co-founder and Board Member, US Environmental Protection Agency Alumni Association
  • Founder and Board Member, Water Resources Action Fund, Inc.
  • Board Member, Parsons Water Fund
  • Council of Partners, Environmental Law Institute
  • Commendation Medal, US Public Health Service Commissioned Corp
  • Distinguished Career Award, US EPA, and two Bronze Medals and a Silver Medal, US EPA
  • Listed in DC Super Lawyers and Best Lawyers in America


  • o: (202) 289-2060
  • f: (202) 289-8683
One of the first environmental attorneys at the U.S. Environmental Protection Agency, Len was instrumental in the development of the Agency’s air, water, permitting and enforcement programs, and has been active in the private sector on cases of national significance.

During his 12 years at EPA and its predecessor agency, Len helped build the Agency and created the structures 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.

Len headed the EPA’s national water enforcement effort as Deputy Assistant Administrator for Water Enforcement and Permits. He also developed the national enforcement effort and designed the framework for all of the EPA permit programs, including the regulations used today for water permits, hazardous waste permits and air permits. His work is memorialized in the regulations that govern much of the operations of permit issuance.

EPA also sent Len to Seattle to open the EPA’s office for the Pacific Northwest, covering Washington State, Oregon, Idaho and Alaska.  He helped establish air and water programs in those states , worked with the state agencies and handled several large enforcement cases.  Early in his government career, Len served as an officer in the Commissioned Corps of the US Public Health Service and then later, when in the civil service, became a Charter Member of the Senior Executive Service (SES) of the US.

Since leaving government, Len has represented some of the largest corporations in the world, as well as several industry groups and associations, on environmental, health and safety issues and championed the cause of new companies from the US, China, Korea and India entering the US agricultural chemical market. His environmental problem solving has often involved questions of technical and regulatory conflicts, and finding a way through complicated situations. Len is presently Senior Counsel at the law firm Sullivan & Worcester LLP.

Len has written books on risk reduction, the Clean Water Act and the water permit program, and has lectured on pollution control, government regulations, generic pesticides market entrants and dispute resolution, at universities, trade associations and international conferences. For example, he spoke in 2010 in Shanghai to the Chinese Crop Protection Industry Association on China’s entry into the US pesticide market and lectured in 2013 at Johns Hopkins University Bloomberg School of Public Health on evaluating hydraulic fracturing.