The decision to this effect was taken at a high-level meeting in the presence of party general secretary and Tamil Nadu chief minister J Jayalalithaa.
The meeting was attended by Lok Sabha MPs-designate and members of the Rajya Sabha, said an official statement.
P Venugopal (Tiruvallur) is the new deputy leader in the Lok Sabha, while P Kumar (Trichy) is whip. K N Ramachandran (Sriperumbudur) is the new treasurer, and R Vanaroja (Tiruvannamalai) is party secretary in the Lok Sabha.
In the Rajya Sabha, Maithreyan will continue to be party's floor leader. He is the chief of party's medical wing as well. S Muthukaruppan will be deputy leader and L Sasikala Pusha will be whip. R Lakshmanan and T Rathinavel have been made treasurer and secretary of the party.
The release said the AIADMK high command exhorted the members on how to function in the public office.
How AIADMK fared in Lok Sabha elections