Julien Simon-Chautemps (born 14 May 1978) is a French motor racing engineer.
[2] Simon-Chautemps is a graduate of the French Institut polytechnique des sciences avancées (2002).
He started his career as Technical Director of Prema Powerteam (2003-2007) and then to Trident Racing (2007).
In 2011 he moved to Renault,[3] and was engineer to Vitaly Petrov, Kimi Räikkönen, Pastor Maldonado, Romain Grosjean[4] and Jolyon Palmer.
When Räikkönen joined Alfa Romeo in 2019, Chautemps became his race engineer for the second time.