What Is McKinsey? What the Firm Does and Who Works There

McKinsey & Company is a management consulting firm. Organizations bring its teams into difficult decisions and changes: deciding where to grow, improving operations, adopting technology, or changing how people work. McKinsey describes itself as one global partnership, and its current capabilities include both advice and implementation. For a prospective consultant, the practical question is what those teams do with a client, and whether you would enjoy that work.

What kind of firm is McKinsey?

James O. McKinsey founded the firm in 1926. Today McKinsey calls itself a single global partnership. Its work reaches beyond corporate strategy: its overview describes working with leaders from the C-suite to the front line, while its public and social-sector practice describes work with governments, health institutions, and other mission-driven organizations.

The firm also publishes research through the McKinsey Global Institute. Research and client service are related, but a published report is not the same thing as a consulting project.

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What does McKinsey do for clients?

McKinsey's current capability pages give a clearer answer than calling every project “strategy.” These are examples, not a fixed menu for every client:

One published project shows the mix. In McKinsey's Entel Connect case study, a Peruvian contact center wanted to learn from the customer calls it could not review manually. McKinsey and its AI arm, QuantumBlack, worked with Google Cloud to build a tool that analyzes calls and gives supervisors coaching information. McKinsey says its analysts worked inside the call center and helped staff use the results. That is strategy, data work, product building, and adoption in one engagement. It is the firm's own client account, not an independent measure of the project's outcome.

What does a consultant do day to day?

The tasks change with the project and seniority. McKinsey's consulting roles page is specific about the progression:

• Business analysts join a client team, work through problems with colleagues and clients, analyze data, and present ideas.
• Associates own a workstream: they investigate an issue, develop a solution, and work alongside the client team to make it useful.
• Engagement managers set direction for a project, manage day-to-day delivery, develop client relationships, and mentor the team.
• Associate partners and partners oversee several projects or major client relationships and help develop the firm's work.

That range makes a generic “day in the life” description unreliable. For example, one team might compare investment options, another might trace a supply-chain bottleneck, and another might work with engineers to help a client adopt an AI tool. These are illustrations drawn from the firm’s listed capabilities, not a promised weekly schedule. Ask the hiring team which practice you would join, how its recent projects used analysts and associates, and what work the client kept after the engagement. Those answers are more useful for judging fit than an unverified firm-wide hours estimate.

A case interview asks you to demonstrate some of the same habits, including clear problem solving and communication. It is still an interview exercise, not a literal simulation of every McKinsey project. For the application steps, use the McKinsey case interview guide and personal experience interview guide.

How does the business model work?

Clients pay McKinsey for consulting and related technology and implementation services. McKinsey describes itself as a partnership, and it also offers software and data solutions alongside consulting. The public primary sources checked for this guide do not establish standard contract pricing, a current staff count, or an annual revenue figure. Those numbers often appear as outside estimates; they are not needed to understand what the firm does.

Would McKinsey consulting work suit you?

Use the role descriptions as a fit test. Would you like to frame an unfamiliar problem, examine evidence, explain a recommendation to a client, and help people act on it? McKinsey's roles also include technology and implementation paths, so “consultant” is not one job description. Read an actual role posting and ask what a recent project required before assuming that every team has the same work or schedule.

If you decide to apply, McKinsey says most consultants enter as business analysts or associates. Its interview guidance says most consulting applicants encounter Solve, and most client-facing candidates have a personal experience and problem-solving interview. Your recruiter confirms the steps for your role. The Business Analyst role guide goes deeper on that entry job; the McKinsey salary guide owns compensation details.

For comparison, the MBB overview explains how McKinsey, BCG, and Bain relate, while the McKinsey competitors guide covers alternatives. A firm name alone will not tell you which project or team fits you best.

Sources and further reading (checked 2026-09-28)

• McKinsey: About us
• McKinsey: Capabilities
• McKinsey: Consulting roles
• McKinsey: Interviewing
• McKinsey: Entel Connect client case