David has been the Chairman and a Managing Partner of Boies Schiller Flexner since its founding in 1997.
David has been selected as one of the 100 Most Influential People in the World by Time Magazine (2010). He has been named Global International Litigator of the Year by Who’s Who Legal an unprecedented seven times. David has been named the Litigator of the Year by The American Lawyer; the Lawyer of the Year by The National Law Journal (twice); the Antitrust Lawyer of the Year by the New York Bar Association; Best Lawyers in America from 1987-2021; Lawdragon 500 Leading Lawyers; and an Eminent Practitioner by Chambers USA. He was named one of the Top 50 Big Law Innovators of the Last 50 Years by The American Lawyer in 2013.
David is the recipient of Honorary Doctor of Laws from the University of Redlands (2000), New York Law School (2007), University of New Hampshire School of Law (2013), and New York University (2013) and an Honorary Doctor of Letters from the Chicago Theological Seminary (2011). His awards include the Award of Merit from the Yale Law School, the ABA Medal from the American Bar Association, the Vanderbilt Medal from New York University Law School, the Pinnacle Award from the International Dyslexia Association, the William Brennan Award from the University of Virginia, the Role Model Award from Equality Forum, the Lead by Example Award from the National Association of Women Lawyers, the Torch of Learning Award from the American Friends of Hebrew University, the Eisendrath Bearer of Light Award from the Union for Reform Judaism, and a Lifetime Achievement Award from the Mississippi Center for Justice.
David served as Chief Counsel and Staff Director of the United States Senate Antitrust Subcommittee in 1978 and Chief Counsel and Staff Director of the United States Senate Judiciary Committee in 1979.
In 1991-1993, he was counsel to the Federal Deposit Insurance Corporation, recovering $1.2 billion from companies who sold junk bonds to failed savings and loan associations.
In 1998-2000, he served as Special Trial Counsel for the United States Department of Justice in its antitrust suit against Microsoft. David also served as the lead counsel for former Vice-President Al Gore in connection with litigation relating to the 2000 election Florida vote count. As co-lead counsel for the plaintiffs in Perry v. Brown, he won the first judgment establishing the right to marry for gay and lesbian citizens under the U.S. Constitution.