Singh will take over as the new additional director general of police (establishment) and will be based in Mumbai.
Borwankar till now was the joint commissioner of police (criminal investigation department), Pune.
She had hit the headlines when she was appointed joint commissioner of police (crime) in Mumbai a few years ago.
In other major transfers, Navi Mumbai Police Commissioner Gulabrao Pol has been shifted to the state police headquarters. His position will now be taken up by Mumbai Additional Police Commissioner Ahmed Javed.
The transfers were effected Wednesday after the monsoon session of the state's legislature ended.