Allchin, Carl: - Carl Allchin is a Tableau Zen Master, multiple time Tableau Ambassador and is The "Other" Head Coach at one of the world's leading data analytics training programmes at The Data School in London. After over a decade in Financial Services as a Business Intelligence Analyst and Manager, he supported hundreds of companies through consulting, blogging and teaching on market leading data solutions. Carl is the co-founder of Preppin' Data, the only weekly Data Preparation challenge on Tableau and other data tools. He published Tableau Prep Up & Running in 2020 through O'Reilly.