Lisa Cohen is a Director of Data Science for Twitter. She leads an organization of 70 data scientists, focused on driving the strategy and direction of the Twitter product. Her team uses machine learning, experimentation and causal analyses, and partners closely with Engineering, Product, Design and Research. Before Twitter, Lisa led the Azure Customer Growth Analytics organization as part of Microsoft Cloud Data sciences. Her team was responsible for analyzing OKRs, informing data-driven decisions, and developing data science models to help customers be successful on Azure. Lisa worked at Microsoft for 17yrs, and also helped develop multiple versions of Visual Studio. She holds Bachelor and Masters degrees from Harvard in Applied Mathematics. You can follow Lisa on LinkedIn and Medium.