Bernstorff began his motor racing career at the age of eight years in karting, where he was active until 2008. After a one year break, he moved to Formula racing and started for Jamun racing in the British Formula Ford with a second place as best result he was seventh overall, while his teammate Scott Pye won the championship. In addition, he took part in two races in the Benelux Formula Ford. 2011 saw the launch Bernstorff for Moto Park Academy in the ADAC Formula Masters. He chose five races for a total of 13 times and stood on the podium. By season's end he was in third place in the overall standings behind Wehrlein Pascal and Sven Müller. However, the score was still provisional because an appeal hearing regarding a race result was. In February, the rating has been corrected and Bernstorff moved up to second place. With 310 to 331 he was defeated Wehrlein. Would Bernstorff failed lying at the last race not just before the race in the lead, he would have won the championship.
2012 moved to Bernstorff ma-con Motorsport in the Formula 3 Euro Series. He also points authorized in the European Formula 3 Championship in 2012. With a third place as the best result he reached the tenth place in both ratings. 2013 drove Bernstorff in German Formula 3 Cup for Lotus. He won six races and was at the end of the season behind his teammate Marvin Kirchhöfer and Artem Markelov in third place. In addition, Bernstorff was for the Prema Powerteam third in the Formula 3 Masters and he took part in two races of the European F3 Open. Outside of Formula 3, he chose the Formula Middle East for themselves.
2014 moved Bernstorff to Carlin in the GP3 Series.
Bernstorff was born in the UK, grew up there and starts predominantly with British license. His parents are Danes. He has ancestors from different nations, including Danish and German nobles. Only in 2010 he started with a Danish racing license.
- 2002-2008: Karting
- 2010: British Formula Ford ( 7th place)
- 2010: Benelux Formula Ford ( No. 19 )
- 2011: ADAC Formula Masters (2nd place)
- 2012: Formula 3 Euro Series (No. 10)
- 2012: European Formula 3 ( 10th place )
- 2013: German Formula 3 ( 3rd place)
- 2013: European F3 Open ( 20th place )
- 2013: Formula Middle East (Master)
- 2014: GP3 Series