Deloitte is one of the Big Four professional services firms, providing audit, tax, consulting, and other services. Founded in 1845 in London, it has grown through mergers and now operates in over 150 countries with over 244,000 employees. The current CEOs are Punit Renjen and Cathy Enyelbert. In India, N. Venkatram is the CEO and managing director, and it has offices in major cities. Deloitte serves customers across industries and provides services including audit, consulting, financial advisory, and enterprise risk. Its major competitors include the other Big Three professional services firms.