Serra will become the head of chassis performance engineering, while d'Ambrosio will become deputy team principal, and head Ferrari’s young driver academy.
How has Toto Wolff responded to Mercedes staff exodus?
Despite these high-profile defections, Toto Wolff remained confident that the team will hold together, and described them as being on an ‘upwards trajectory’.
“We're in a really good spot because we've had eight consecutive championships and then it started to deteriorate and part of that is also human component,” Wolff said to Sky Sports after FP3 in Imola.
“And I think how it's shaping up now some wanted to go some we had to [let] go.
"In the same time we're getting fresh joiners, and all of that with the leadership of James [Allison] who does that so well and is such an inspiration for the team that I feel we're in a really upward trajectory with the motivation, the energy, the competence presumably.”