Jacoby started his quizzing career at a pub quiz in an Irish pub, which opened in his home town, Oberstdorf, in 1996. Later he created and presented several pub quizzes in the Duisburg area.[4]
In 2011 he was a founding member of the Deutscher Quiz-Verein[de] (German Quizzing Association).[5] He continues to be one of the leading quiz championship players in Germany, having won the individual competition at the German Quizzing Championships at their inaugural edition in 2012,[6] in 2014,[7] and in 2024.[8] He also has represented Germany as part of their national team at several European Quizzing Championships.[9]
In April 2012 he won the first edition of the ZDF TV show Der Super-Champion (now Der Quiz-Champion[de]), winning €500,000.[10]
Since 2013 he has appeared as one of the "chasers" (Jäger) on Gefragt – Gejagt, the German adaptation of the British game show, The Chase, where he is known as Der Quizgott (The Quizzing God).[11]
