Hegewald spent three seasons racing in professional karting, including a 5th place in the 2002 Junior Monaco Kart Cup at ICA Junior level, racing against the likes of Formula Three Euroseries racers Alexander Sims, Jean Karl Vernay, Stefano Coletti and Jules Bianchi and also Sébastien Buemi.

His results in the pan-European championship improved and he ended up a creditable fifth in the championship with two podiums, however he was outperformed on numerous occasions by team-mate Valtteri Bottas, who eventually went on to claim the Eurocup after a hard-fought title battle with Daniel Ricciardo, the highly consistent Andrea Caldarelli and Roberto Merhi.

Again, Bottas dominated the title race, and Hegewald was also beaten by António Félix da Costa, as Motopark locked out the top four positions in the championship – Johan Jokinen also finished fourth.

Hegewald competed in the second event of the 2009 Formula Renault 3.5 Series season, replacing Mihai Marinescu at the Interwetten team.

[4] He drove car number 8 in the series, and finished sixth in the championship, including a dominating weekend at Spa, when he took both poles, both fastest laps and both wins.