Leslie G. Fields, Esq. brings more than 20 years of federal, state, local, and international environmental justice and environmental law and policy experience to the Sierra Club. Fields was appointed by President Obama to serve on the Board of Directors of the Mickey Leland Urban Air Toxics Research Center. She serves on the board of the Children's Environmental Health Network. She also serves on the board of Adeso African Solutions (formerly Horn Relief—an East African natural resources and development organization). 

Fields teaches international environmental law as an adjunct law professor at Howard University School of Law. Leslie Fields is a graduate of Cornell University and the Georgetown University Law Center.