The Yorkshire outfit earned promotion to the top flight for the first time in 44 years after beating Reading in a play-off penalty shoot-out at Wembley.
The accomplishment was even more impressive considering that it was the German’s first season in charge at the club and he had less than a £12million playing budget.
The 45-year-old has already bolstered his squad ahead of the upcoming Premier League season, signing Aaron Mooy on a three-year deal while also snapping up strikers Laurent Depoitre and Elias Kachunga.
“Head coach David Wagner and assistant head coach Christoph Buehler have reaffirmed their commitment to Huddersfield Town after signing new contracts at the club,” Huddersfield announced on their official website.
“David and Christoph have put pen to paper on new contracts that will run until the summer of 2019 ahead of the club’s first ever Premier League campaign.”