Berdon LLP — a full-service accounting and advisory firm ranked among the top 20 CPA firms in the nation — is recognized for its long-term business commitment to clients. Founded in 1917, Berdon has more than 350 professionals and staff at offices in New York City and Jericho, Long Island. From individuals to privately held organizations of all types and sizes to multinational corporations, our clients operate in a diverse spectrum of industries and professions.