The move is seen as an apparent quid pro quo for sackng jailed leader V K Sasikala and himself.
Sasikala was sacked as interim chief at the meeting of the executive committee and general council, the party's top decision making bodies, yesterday.
Also, all appointments made by her, including that of naming Dhinakaran as deputy chief, were rescinded.
Against this backdrop, Chief Minister K Palaniswami, who is the Headquarters Secretary, was removed from his post.
In his place, former Minister and sitting MLA P Palaniappan, a key Dhinakaran loyalist, was named the party's Headquarters Secretary, a party release said.
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At that time, there was no mention whether Palaniswami continued to hold his key post of headuqarters secretary.
In another major move, Dhinakaran removed Forest Minsiter Dindigul C Srinivasan from his post as party treasurer.
Srinivasan was named treasurer by Sasikala before she surrendered in a Bengaluru court on February 15 following her convinction in a graft case.
Sitting MLA (Thanjavur) M Rengasamy replaces Srinivasan as party treasurer.
Dhinakaran, meanwhile, in another party release dated "September 11" and issued tonight, announced the removal of two more senior functionaries from their posts.
While Sundaram is the party's organising secretary and also a former State Minister and an ex-Rajya Sabha MP, Hussain is the Secretary of Anaithulaga MGR Mandram, a party wing.
The move comes after the removal of many party functionaries from their respective posts as they had sided with Chief Minister Palaniswami and Panneerselvam camp.
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