It has been confirmed McCormack will once again be riding for Roadhouse Macau by FHO, competing in the Superbike, Superstock and Senior TT races, this year on a BMW M1000RR.
And for the 2024 event he will be joined at the team by fellow Irishman Eoin O'Siochru, who is set to make his TT debut.
The pair will take part in the Supersport and Supertwin races under the Global Robots banner on Triumph and Aprilia machinery respectively.
O'Siochru, who first took to the 37.7-mile (60km) Mountain Course at the Manx Grand Prix in 2022, said: "I just can't wait to get going."
The 32-year-old said: "The TT's been an absolute dream of mine for as long as I can remember, and when I first visited the island and saw the bikes go by I knew it was what I wanted to do.
"Getting to do the TT this year with a team as professional as Roadhouse Macau and with an experienced rider as Brian is something that I can only have dreamed of.
"I'm still pinching myself now trying to believe it's true."
The Isle of Man TT races are set to take place between 27 May and 8 June this year.
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