Sebastian Vettel will have a new race engineer in 2015 after Red Bull promoted Guillaume Rocquelin to the position of Head of Race Engineering.

Vettel and Rocquelin - better known as Rocky - have won four drivers' world championships together, with the pairing having worked together since Vettel was promoted to Red Bull from Toro Rosso in 2009.

Now Red Bull has announced that Rocquelin will be promoted to Head of Race Engineering, making him responsible for all of the team's race engineers at the circuit.

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Vettel's new race engineer will be Gianpiero Lambiase - who is currently Sergio Perez's race engineer - and is set to join Red Bull from Force India at the end of the season.