Luuk Sengers is a freelance investigative data journalist, currently working for the Dutch magazine De Groene Amsterdammer. He also teaches at universities and in news rooms: investigative project management, interviewing and data journalism (Excel, SQL and R). Luuk trained and advised campaigners of nonprofits like Greenpeace and Friends of the Earth. Together with Mark Lee Hunter he developed the critically acclaimed Story-Based Inquiry method. Luuk has worked as a staff economy reporter for several national newspapers and magazines and was a board member of the Dutch-Flemish association of investigative journalists, the VVOJ. He co-authored five books about investigative reporting, two of them Logan handbooks for the CIJ. His recent investigations looked into the effects of big businesses on climate change and pollution. www.luuksengers.nl