Our authors

The people behind Grape Guru's wine knowledge – well-founded, honest and passionate about good wine.

Robert Kozinski
Co-Founder & SommelierRobert is co-founder of Grape Guru, a certified sommelier (IHK) and WSET Level 2 graduate. He combines in-depth wine knowledge with technology to make wine more accessible for everyone.
Johannes Quernheim
Wine Influencer & Content CreatorJohannes is one of the most popular wine content creators in the German-speaking world, making wine tangible for a large community.