Kristján Einar was born in Garðabær. He started racing Karts at 14, the age when Icelandic law allows young drivers to start racing and training in karts. As the only teenager competing, Kristján finished up 8th in his debut season of 2003, starting his racing career . The following year Kristjan was back racing, this time finishing the 2004 season in 4th place, the following season finishing second and the highlight being the 2006 season, winning the Icelandic National karting championship, and still holding that title to date.
To kick off his single-seater racing career, Kristján Einar took advantage of southern hemisphere racing. During the winter break in the UK, and went to New Zealand to compete his first international races, finishing three rounds in the Toyota Racing Series; adding to his experience and getting quicker every lap, Einar earned the necessary racing experience he needed to start his season in the 2008 British Formula Three season. Einar teamed up with Matt Halliday at Triple X Motorsport.
2008 British Formula Three season
Kristján Einar's first full racing season was the 2008 British Formula Three season with Carlin Motorsport. 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 raced in the national class, and scored his first podium at the third round of the season, at Monza. Kristján missed the last three races of the season, and finish seventh in the national class. 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.
Kristján Einar started his career testing Formula BMW with Carlin Motorsport for the second half of the 2007 season, aiming at entering the 2008 Formula BMW UK championship. When the FBMW UK changed into Formula BMW Europe Kristján was offered to test more powerful cars with Carlin Motorsport and 7 months to the day he first drove a single seater, he was on the grid of the British Formula 3. After a full year of successful racing in Britain, Kristján started looking elsewhere, and headed off to the USA, to test for the famous Newman Wachs Racing for the Atlantic Championship. 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.