Consulting Firm Tiers and the 4 Types of Firms, Explained
By Dr. Florian Smeritschnig, Former McKinsey Senior Consultant · Updated November 2026 Consulting firm tiers work like this: Tier 1 is McKinsey, BCG, and Bain (MBB); Tier 2 is the strategy firms just below them, such as Oliver Wyman, L.E.K., Kearney, Roland Berger, and the Big 4 strategy arms (in some cases); and the full-service Big…
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