In 2016, the size of the global management consulting market reached 133 billion U.S. dollars. Management consulting is one part of the global consulting market and is comprised of three sectors: strategy, human resources and operations.
The Big Three
The Big Three is the term used for the three largest management consultancy firms in the world. Not only are the three biggest, they are considered the most prestigious employers in the industry. The Big Three consist of McKinsey & Company, Boston Consulting Group, and Bain & Company. McKinsey & Company was rated by their peers the leading consulting firm in the United States in 2018. Not only was McKinsey & Company the leading consulting firm by prestige, they were also ranked as the best-rated consulting firm to work for in the United States that year. Boston Consulting Group had 18,500 employees and had global sales amounting to 7.5 billion U.S. dollars in 2018.