Andrew Dale Weissman of Bethesda, MD, passed away on Sunday, September 5, 2021, at the age of 72. Beloved husband of Grace Weissman; devoted father of Lauren (Michael) and Jeremy (Rebecca); loving papa of Amanda and Matthew; adored brother of Steve (Laura) and Nancy (Michael); cherished son of Jean and Lowell; and beloved member of his extended family. Andy was known to all as a brilliant and kind man. His life was imbued with a passion for his work and intellectual pursuits, as well as a tremendous and profound love for his family. As a youth, he was a star student. At the University of Michigan in the sixties he was also a committed civil rights activist whose efforts led to significant reforms at the University. After college he attended Harvard Law School and subsequently found his lifelong pursuit working on energy law and analysis. His immense interest in energy law and policy was undergirded both by the intellectual stimulation of its complexities and by his dedication to social justice and the common good, striving so that the benefits of modern industrialization could be as affordable and accessible to as many people as possible. Andy started his legal career at Leva, Hawes, Symington, Martin & Oppenheimer and was a partner at Swidler Berlin. As an attorney he did pathbreaking work in energy and environmental law including pioneering emissions trading in the United States. Later in his career he became an entrepreneur and founded EBW Analytics Group in 2003. There he served as its CEO, cementing his status as a world-renowned leader in energy industry analysis. In this role he authored highly influential articles, held packed seminars, and provided consulting services around the globe. Apart from his work he had a great love for reading with special interests in history, philosophy, and science. He also had a strong admiration for art, theater, and music and a tremendous enjoyment of sports, regularly attending baseball, basketball, and football games in Washington. Above all else his heart and soul were with his family to whom he is remembered as being an overwhelmingly caring, warm, empathetic, supportive, and profoundly loving man. In his later years he felt tremendously lucky to have his two wonderful grandchildren living nearby whom he adored and spent time with on a weekly basis. He was extremely proud of and happy for his family. Graveside services will be held privately. In lieu of flowers, donations may be made to the Clean Air Task Force (catf.us) or the Legal Aid Society of the District of Columbia (legalaiddc.org).