Lester Sotsky is a retired partner who headed the firm's environmental practice from 2006 to 2015. He is a broadly experienced environmental litigator, handling multiple toxic tort, hazardous waste enforcement, Clean Water Act, appellate, and white collar matters. Mr. Sotsky has represented major corporations in virtually every major manufacturing and mining industry, as well as Native American Tribes and other stakeholders.

  • Lead defense counsel in numerous toxic tort cases involving: varied contaminated media; metals, radioactive, organic and inorganic chemicals; drinking water, surface and groundwater, and air emissions; discontinued historical manufacturing operations and heavily regulated active facilities and businesses.
  • Class actions: successfully defended or resolved every client class and mass tort actions; counsels numerous clients on  proactive measures to mitigate exposure to environmental, toxic tort and product liabilities.
  • National counsel to multiple clients on sophisticated environmental regulatory matters.
  • Litigates enforcement cases and other environmental matters involving hazardous waste, Superfund, water pollution, and air pollution in numerous courts and administrative fora.
  • Experienced appellate, civil, and criminal litigator.
  • Counsels numerous clients on regulatory compliance and environmental health and safety management matters.
  • Advises in the design and implementation of environmental management and compliance programs.
  • Headed numerous environmental due diligence teams, and negotiated (and litigated) contractual agreements concerning environmental and product liabilities in mergers, acquisitions, and other transactions.


The Chemical Compound—January 2018
Legal Updates on High Priority Chemicals and Important Chemical-Regulatory Developments
The Chemical Compound—October 2017
Legal and Regulatory Updates on High Priority Chemicals
The Chemical Compound—June 2017
Legal and Regulatory Updates on High Priority Chemicals
The Chemical Compound—April 2017
Legal and Regulatory Updates on High Priority Chemicals
How Do I Talk to My Neighbor? (Our Alternative Universes)
Law360 In-Depth


The Legal 500 US
"Leading Lawyer" – Environment: Litigation (2008, 2011-2017)
Environment: Litigation (2009-2017)
Product Liability and Mass Tort Defense: Toxic Tort (2014, 2016-2017)
Chambers USA
Environment (DC) (2011-2017)
Products Liability: Toxic Torts (2007-2011)
Washington, DC Super Lawyers
Environmental Litigation (2010-2011, 2013-2017)


  • JD, Yale Law School, 1979
  • BA, Brandeis University, 1976, summa cum laude
  • District of Columbia
  • Supreme Court of the United States
  • Council of Partners, Environmental Law Institute

  • Member, Environment, Energy and Resources Section, American Bar Association


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