Holly Hester-Reilly

Product Leader & Founder


Holly Hester-Reilly is the Founder of Product Science Group and the host of the Product Science Podcast. Holly is a former Columbia University research scientist and has spent the last 15 years leading product initiatives at startups, high-growth companies, and enterprises like FalconX, MediaMath, Shutterstock, GTreasury, The Lean Startup Co, Unilever, Capital One, and Weight Watchers. With those experiences she has developed the Product Science Method, a framework to discover the strongest product opportunities and lay the foundations for high-growth products, teams, and businesses. 

Her team at the Product Science Group partners with startup founders and product leaders to share this framework, helping them to figure out which product growth opportunities they should pursue and build the product management skill to deliver on their goals. 

Holly also teaches at NYU Stern School of Business as well as public and private workshops and has spoken about building high-growth products for events such as Lean Startup Summit Europe, Women in Product's Annual Conference, ProductTankNYC, Parsons School of Design, and INDUSTRY: The Product Conference.


I believe that we can use technology to solve real problems for real people, and I want to help create sustainable, enjoyable experiences for high-growth tech products, teams, and companies.

Just For Fun

Holly was a competitive figure skater in the 1990s during the reign of Michelle Kwan, who was her childhood hero. She trained at the same training center as Olympians including Surya Bonaly, Ilya Kulik, and Pasha Grishuk and Evgeny Platov.

Meet Our Team

The Product Science Group is made of passionate product leaders with decades of experience across startups and enterprises.

Adam Thomas

Product Management Coach

Adam Thomas, a seasoned product professional with over 15 years of experience, balances customer needs, team dynamics, and organizational goals, leading transformative initiatives and empowering product teams through workshops and education to foster collaboration and data-driven decisions.

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Milene Mondek

Data and AI Product Manager

Milene is a Data and AI Strategy Professional with a Master’s degree in Applied Mathematics. She has extensive experience in technical roles and leading AI product development at digital banks and startups to enhance user engagement and customer satisfaction.

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Allison Cassing

User Researcher

Allison is a user researcher with over a decade of product management experience focused in data and insights at growth-stage startups MediaMath and Newsela. She has a deep interest in user experience and motivation.

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