Sebastien Racineux is a science teacher and barista trainer. He founded the organisation 'Espressologie' in 2011 and was runner-up in the 2012 French Brewers Cup competition. Chung-Leng Tran is a photographer and barista. He was the French Brewers Cup champion in 2012. In 2015 Sebastien and Chung-Leng joined forces to open their roastery and coffee shop, Hexagon Cafe, in Paris, where they both live. Yannis Varoutsikos is an illustrator and graphic designer. He is artistic director at Woll Beer and founder of the website Good Manners, which sells bags and accessories for men. Yannis lives in France.