Known throughout the world
Deloitte's U.S. operations have more than 60,000 professionals
in 90 cities and works in four key business areas: audit and
advisory, consulting, financial advisory, and tax. Ranked the No. 1
accounting firm in the U.S. by annual revenue, Deloitte is the U.S.
member firm of Deloitte Touche Tohmatsu Limited, an international
network composed of dozens of member firms that operate in more
than 150 countries and employ more than 210,000 people. Each member
firm provides services according to the rules and regulations of
the country in which it operates.
In the U.S., Deloitte does business through four subsidiaries:
Deloitte Tax LLP, Deloitte Consulting LLP, Deloitte Financial
Advisory Services LLP and Deloitte & Touche LLP, its accounting
arm. It serves a variety of industries, including life sciences;
telecommunications; air and defense; real estate; consumer
products; oil and gas; technology; power and utilities; media and
entertainment; private equity, hedge funds and mutual funds;
automotive; health plans; retail; banking and securities;
insurance; federal government; health care providers; process and
industrial products; state government; and tourism, hospitality and
In 2015, Deloitte LLP named a new CEO: Cathy Engelbert, who
became the first female chief executive of a Big 4 firm. Engelbert
previously served as CEO of Deloitte's audit division.