Jeffrey Heer is a prominent computer scientist known for his work in data visualization and human-computer interaction. He is a professor at the University of Washington and co-founder of Trifacta, a company focused on data wrangling. His research aims to improve how people understand and interact with complex data sets. Heer is also recognized for developing several influential tools, including D3.js, a JavaScript library for producing dynamic, interactive data visualizations in web browsers. His contributions have significantly advanced the field of data visualization, making it more accessible and effective for users across various domains.