Deloitte is a British-founded multinational professional services network and one of the “Big Four” firms, providing audit, consulting, financial advisory, risk advisory, tax, and legal services to organizations worldwide. Founded in 1845 in London by William Welch Deloitte, the organization operates through a network of legally separate member firms coordinated under Deloitte Touche Tohmatsu Limited. While its historical roots are in the UK, Deloitte maintains major leadership and operating centers across multiple markets, including a significant presence in the United States. The firm serves clients across major industries, including financial services, government, healthcare, consumer, energy, and technology, while continuing to expand its capabilities in AI, data, cloud, cyber, and enterprise platform partnerships.

Global Headquarters: London, England, United Kingdom
US Headquarters: 30 Rockefeller Plaza, New York, New York, USA
Number of Employees: 80,000+