Bologna have announced the signing of the former Lazio and Inter man after he underwent a medical.
The Rossoblu have been struggling in Serie A and a reinforcement was necessary.
Cesar's wealth of experience is likely to help with their relegation fight and he knows Mihajlovic well from his days at Inter.
A statement on the club's official website reads:
"Bologna FC 1909 would like to communicate that we have reached an agreement to sign Brazilian winger Aparecido Cesar Rodriguez, born in Sao Paulo on October 24 1974.
"Cesar played for Inter last season and he was at Livorno and Corinthians before that on loan.
"He will be presented to the press this afternoon at 14:00 local time at the club's Galli training centre."
Cesar arrives on a free transfer after he was released by Inter during the summer.
He has been out of action since then but he has been training alongside Antonio Bovenzi who is one of Mihajlovic's assistants in Rome over the last three months.
The arrival of the player shows the club's intentions for the season as they are keen on staying up following their promotion from Serie B last term.
A number of reports suggest more players are expected to arrive during the January transfer window.