Marussia have confirmed the arrival of Francesco Nenci from Sauber as Jules Bianchi's race engineer while Paul Davison is the new Head of Vehicle Performance.
Ahead of this weekend's Spanish Grand Prix, Marussia have announced two key personnel changes.
Davison, who held the position of race engineer since 2012 - first to Charles Pic and then Bianchi, has been promoted to Head of Vehicle Performance.
His vacant position as Bianchi's race engineer has now gone to Nenci, who has joined from Sauber.
The team said in a statement: "Paul and Francesco will work together by way of a handover at the Spanish Grand Prix this weekend, after which Paul will be fully focused on his new role based at the Marussia Technical Centre in Banbury, UK."