Hajo Riesenbeck is a director based in the Düsseldorf office of McKinsey. He has been serving clients across a range of industries, e.g., consumer goods, financial services, branded industrial products, retail, transportation, and chemical companies. Hajo Riesenbeck is a leader of McKinsey's International Marketing Practice and was co-author, with Jesko Perrey, of the first two German editions of Mega-Macht Marke in 2004 and 2005, along with numerous articles and speeches on marketing.

Dr. Jesko Perrey is a partner based in the Düsseldorf office of McKinsey and the leader of the German Marketing & Sales Practice. He has served a wide range of clients primarily in the consumer goods, retail, financial, travel and logistics, and automotive industries. The focus of his consulting work is on marketing strategies and brand management, as well as on functional strategies in industry and retailing.