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John Warner

Senior Partner, Cleveland
Coleads the firm’s Global Energy and Materials Practice.

About John

Having spent over 27 years with the firm, John is currently the coleader of the Global Energy and Materials Practice. He is also a member of the firm’s Senior Partner Review Committee and the Americas senior leadership team.

John focuses his client efforts on fundamentally improving the performance trajectory of leading-edge companies. Specific areas include corporate strategy and finance, marketing and sales, operations, organization-efficiency effectiveness, and change management.

John has a passion for Ohio and has led many high-impact initiatives with the business community on economic development, healthcare, and education. He is currently co‑chair of the Ohio Business Roundtable.

Prior to McKinsey, John was a financial analyst at a multinational conglomerate, where he was a graduate of the company’s financial-management program. In addition to his MBA from Harvard Business School, John has a BA in Economics from the College of William and Mary, and a general course degree from the London School of Economics.

Past experience

General Electric
Financial analyst

Education

Harvard Business School
MBA

College of William & Mary
BA, economics