Hajo Riesenbeck joined McKinsey Duesseldorf as consultant in 1979. He was elected to Principal in 1985 and to Director in 1991. He has been serving clients across a range of industries, e.g., consumer goods, financial services, branded industrial products, retail, transportation and chemical companies. He is one of the leaders of McKinsey's Global Marketing Practice and was co-author of the first two editions of Mega-Macht-Marke (Engl.: Power Brands: Measuring, Building, and Managing Brand Success) in 2004 and 2005, along with numerous articles and speeches on marketing.

Jesko Perrey is a Partner of McKinsey & Company, Inc. and based in the Duesseldorf office which he joined in 1999. He is a member of McKinsey's European Marketing & Sales Practice as well as of the European Retail Practice. Furthermore, he is the European leader of the Branding & Marketing Spend Effectiveness Sub-Center and is co-author of Mega-Macht-Marke (Engl.: Power Brands: Measuring, Managing, and Mastering Brand Success) (2004 and 2005).