Brooke will now head a combined Channel 4 marketing, communications and corporate relations group, reporting directly to chief executive David Abraham.
Current head of marketing for the network Rufus Radcliffe will remain in place, along with corporate relations head Nick Toon and press and publicity director Jane Fletcher.
All three will now report into Brooke, reducing the number of executives reporting directly to Abraham.
Formerly at independent production company Rare Day, Brooke was previously managing director at Discovery Networks UK.
He worked at Channel 4 between 1998 and 2005, joining as the head of marketing and development for FilmFour, rising to be managing director of digital Channels. Brooke was also involved in the development of Channel 4’s portfolio of digital channels.
Abraham says: “Having been the driving force behind the birth of Channel 4’s portfolio of digital channels Dan is returning here at the dawn of digital convergence, an era where communication with all of our audiences will be more vital than ever to the success of Channel 4’s mission.”
Abraham said last month he would be focusing on how the channel could work better with advertisers and agencies over the next year.