As the only teenager competing, Kristján finished up 8th in his debut season of 2003, starting his racing career rolling his gokart(Video) .

Kristján's entry caught attention; a driver coming from a country with no racetrack and going almost directly from karting into the most successful British Formula Three team ever.

Kristján Einar was part of a very strong Carlin lineup, this helped him improve at a very fast pace, Kristján's teammate in the national class was Andrew Meyrick and Carlin's championship lineup was Jaime Alguersuari, Brendon Hartley, Oliver Turvey and Sam Abay.

After a good outing at Sebring International Raceway Kristján was about to sign up for the 2009 Atlantic Championship season when sponsorship fell through.

Kristján Einar has always had a passion for sportscars, and in 2009 he was offered to try out the new Formula Le Mans Cup prototype at the Paul Ricard Circuit in France.