SESOAMH Mac Ceallabhuí has left his role at Sean MacCumhaills to take up a job as a club manager in Tyrone.
Mac Ceallabhúi, was on the management team of Paul Rouse at MacCumhaills in 2020 and the pair had been expected to join forces again in 2021.
However, MacCeallabhuí has been installed as the manager of Tyrone intermediate side Naomh Eóghan.
The Glenties native guided Red Hughs to Ulster and Donegal Junior Championship glory in 2018.
Naomh Eógan was an amalgamation formed in 2019 between Newtownstewart and Dregish.
The news will not affect Rouse, who will continue at the helm of MacCumhaills this year.