Sandbech comes from Rykkinn in Bærum and competes for the club BSK Snowboard. He started snowboarding at the age of eight and, in 2007, was invited to the rookie-competition of The Arctic Challenge. The organizer of TAC Terje Håkonsen said Sandbech was the best 13-year-old snowboarder in Norway at the time.
Sandbech represented Norway at the 2010 Winter Olympics in Vancouver, becoming the youngest Norwegian to go to the Olympics since Sonja Henie represented Norway at the 1928 Winter Olympics 82 years earlier.
Four Norwegians qualified for the Big Air final in the 2014 games, with Sandbech placing the highest and winning the bronze medal. At the 2014 Winter Olympics, Sandbech participated in slopestyle, the first time it was included in an Olympic program
In his first run he tried a triple cork, but failed to land lieutenant He had a successful second run, and with 91.75 points he placed second behind Sage Kotsenburg.
lieutenant was Norway"s first medal in the 2014 Olympics.