BDO USA began in 1910 as Seidman & Seidman, a firm started by three Seidman brothers, and later became part of the BDO network. The company provides assurance, tax, financial advisory, and consulting services to clients throughout the country and around the globe, serving public companies, privately held businesses, and other organizations. Its work spans audit and assurance, tax compliance and planning, transaction support, risk and advisory services, and other professional services that help clients respond to regulatory, operational, and growth challenges. BDO USA also works through the BDO Alliance USA and the broader international network, which extends its reach and resources while keeping a focus on client service and long-term relationships.