Katy Zack

European Communications@Index Ventures
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Summary

Communications for innovation x impact. I'm a communications leader with nearly 20 years of experience helping innovative companies tell stories that shape industries and drive impact. I’ve worked across sectors — from digital innovation and fintech to ESG and international climate action — helping organisations translate complex ideas into clear, human narratives that align business strategy with long-term value. Now, I'm working at OpenAI telling stories of AI in business. Most recently, I led sustainability at Griffin, a startup bank for fintechs. As part of that journey, we became a B Corp, achieving certification in less than 5 months from submission and earning a score that beat sector and stage averages. Plus, we got some incredible sustainability-minded investors, team and customers supporting our journey! I've also worked as consultant to the UN Environment Programme engaging the fashion sector to align communication towards the 1.5 degree pathway and building the Tech Zero community to get tech companies of all stages to start their climate journey. Previously, I was a communications leader that helped more than 100 high-growth companies build and manage their reputations, working at the intersection of technology, media & corporate innovation. I live in London, spent a decade in NYC and grew up outside Detroit.

Work experience

  • European Communications

    Index Ventures
    2026.02-Current(6 months)
  • Communications

    OpenAI
    2025.05-2026.01(9 months)
  • Independent Strategy & Communications Consultant

    ZackComms
    2016.01-2025.05(9 years)
  • Head of Sustainability

    Griffin
    2023.01-2025.01(2 years)
  • Independent Strategy & Communications Consultant

    Zack Comms
    2016.10-2023.01(6 years)
  • Partnerships Working Group leader

    Tech Zero
    2021.01-2022.01(a year)
  • Advocacy Lead - Sustainable Fashion

    UN Environment Programme
    2021.01-2022.01(a year)
  • Director of Global Marketing Communications

    xAd, Inc
    2014.01-2015.12(2 years)
  • Director of Global Communications

    Critical Mass
    2013.01-2014.07(2 years)
  • Head of US Marketing and PR

    AKQA
    2011.01-2013.03(2 years)
  • Communications Manager

    Howcast Media
    2009.01-2011.01(2 years)

Educational experience

  • University of Michigan

    BA Biopsychology
    2004.01-2006.01(2 years)
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