Soledad Galli is a lead data scientist, instructor, and software developer with 10+ years of experience in world-class academic institutions and finance and insurance businesses. She developed machine learning models in finance and insurance, received a Data Science Leaders Award in 2018 and was selected as "LinkedIn’s voice" in data science and analytics in 2019. Sole is the founder of the educational programme Train in Data (www.trainindata.com), where she creates and teaches online courses on machine learning. She is also the author of the Packt book "Python Feature Engineering Cookbook" and she is the creator and maintainer of the open-source Python library Feature-engine. Sole is passionate about democratizing technological tools through open source and making tools and knowledge accessible to a wide community. Sole has an MSc in Biology, a PhD in Biochemistry and 8+ years of experience as a research scientist at well-known institutions like University College London and the Max Planck Institute. She has scientific publications in various fields, such as Cancer Research and Neuroscience, and her research has been covered by the media on multiple occasions.