William H. Lewis was a co-founder of the Montpelier Foundation and chair of the board of directors for its first eight years, serving for nineteen years on its governance committee. Nationally recognized as an expert on clean air regulation and litigation, he is a retired partner and, later, senior counsel, of an international law firm. He served as director of the National Commission on Air Quality, as well as executive officer of the California Air Resources Board. He was listed in Best Lawyers in America and Washington, DC Super Lawyers. He is a graduate of the University of North Carolina with an AB degree and a JD with honors from its law school.