(L to R): Sebastian Vettel (GER) Red Bull Racing and Guillaume Rocquelin (FRA) Red Bull Racing Race Engineer, on the grid. Formula One World Championship, Rd2, Malaysian Grand Prix, Race, Sepang, Malaysia, Sunday, 30 March 2014. © Sutton Images
Rocquelin, who can regularly be heard communicating with Vettel over team radio, has worked with the German for the past six years, engineering him to all four of his world titles.
In his new role, Rocquelin - commonly known as Rocky - will continue to travel to races where he will be responsible for all of Red Bull's race engineers, including Vettel's new engineer Gianpiero Lambiase, who will join from Force India.