Career
Schnellhardt joined the youth set-up of 1. Football Club Köln from Football Club Rot-Weiß Erfurt, and he advanced through the club"s youth system, making his debut for the second team in a 1-1 draw with Wuppertaler SV in Regionalliga West on 5 August 2012. After establishing himself in the second team, Schnellhardt made his 2.
Bundesliga debut for 1.
He joined MSV Duisburg for the 2014-2015 season. He was loaned out to Holstein Kiel for the 2015-2016 season.