Michiel Rozema is one of the world's top Power BI experts. He holds a master's degree in mathematics and has worked in the IT industry for over 30 years as a consultant and manager. Michiel was the data insight lead at Microsoft Netherlands and launched Power BI in the country. He is the author of multiple books on Power Pivot and Power BI and has published video courses on Microsoft Fabric and Power BI on LinkedIn Learning. Michiel is founder of Quanto, organizer of the Power BI Summer School,, and speaker at many conferences on Power BI. He has been awarded the Microsoft MVP award since 2019. Madzy Stikkelorum has a master's degree in Mathematics and works at Quanto where she enjoys helping clients solve complex problems with Microsoft Power BI solutions. She is co-author of the book Microsoft Power BI Visual Calculations: Simplifying DAX and she launched the video training Mastering Business Intelligence with DAX, Power BI, and Excel in 2025 with Michiel. Madzy lives with her husband and two sons in the Netherlands, and in her spare time she loves to read, bake, and work on creative projects of all kinds–with or without sons, with mixed results regarding creativity and complexity Henk Vlootman is a senior global Power Platform, Power BI, and Excel business consultant. Every year since 2013, Henk has received the Microsoft MVP award for his outstanding expertise and community leadership. Henk is one of founders of the Dutch Power BI user group and the organizer of the Power BI Summer School, and has been a speaker at many conferences on Power BI all over the world. He is also the author of two Excel and two Power Pivot / Power BI books. He started his career in 1992 with his own company, then as an Excel consultant. Nowadays he runs the consultancy company Quanto, specialists in Power BI, together with fellow MVP Michiel Rozema.