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 Ventures2026.02-Current(6 months)Communications
OpenAI2025.05-2026.01(9 months)Independent Strategy & Communications Consultant
ZackComms2016.01-2025.05(9 years)Head of Sustainability
Griffin2023.01-2025.01(2 years)Independent Strategy & Communications Consultant
Zack Comms2016.10-2023.01(6 years)Partnerships Working Group leader
Tech Zero2021.01-2022.01(a year)Advocacy Lead - Sustainable Fashion
UN Environment Programme2021.01-2022.01(a year)Director of Global Marketing Communications
xAd, Inc2014.01-2015.12(2 years)Director of Global Communications
Critical Mass2013.01-2014.07(2 years)Head of US Marketing and PR
AKQA2011.01-2013.03(2 years)Communications Manager
Howcast Media2009.01-2011.01(2 years)
Educational experience
University of Michigan
BA Biopsychology2004.01-2006.01(2 years)
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