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David Ratajczak is a member of the Consumer and the Technology, Media & Telecommunications practices at The Boston Consulting Group. He is also a core member of the Marketing, Sales & Pricing practice.

David joined BCG in 2007 and has significant experience in driving growth in companies of varying size and industry. He leads BCG’s digital marketing accelerator (DMA) in North America; the accelerator is a diverse team of practitioners with management consulting, agency, and ad tech backgrounds; it has been built to help advertisers improve dramatically the efficiency and effectiveness of their digital marketing.

Prior to joining BCG, David was the assistant to the chief scientist at Yahoo! He also founded three software start-up companies.

Areas of Expertise

  • Digital and data-driven marketing
  • Digital go-to-market
  • Big data and analytics enablement
  • Precision digital marketing
  • Organization and data architecture redesign
  • Global team development


  • MSc, computer science, University of California, Berkeley
  • BSc, mathematics, computer science, Massachusetts Institute of Technology
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