Mourinho has moved quickly to make his appointments, with Sacramento arriving as assistant manager and Santos becoming goalkeeper coach after leaving French Ligue 1 outfit Lille.
Formosinho, Cerra and Lain meanwhile are all reunited with Mourinho having worked with the Portuguese during his time at Manchester United.
Formosinho and Cerra become the club's tactical analyst and technical analyst respectively while Lain, who also worked with Mourinho at Chelsea and Real Madrid, becomes the club's new fitness coach.