It was announced earlier this year that Sky will share the rights to Formula One with the BBC from 2012, launching a dedicated channel specifically for the coverage.
It was rumoured that Sky would poach the BBC's lead Formula One commentator, and Brundle will now head its team to cover every race, qualifying and practice session live.
Revealing the news on Twitter, Brundle said: "Can confirm I'll be commentating on Sky Sports F1 in 2012. All races live on dedicated F1 channel + more tech features is what motivates me. Yes I'll be doing grid walks in the future of course, it's my trademark.
"It's not for me [to] announce who else is working where from next season. I'm convinced two mighty broadcasters in Sky and BBC head to head at 10 races will be great for F1 fans overall. Be patient, lots happening."
He added: "Yes money is better but with deals I could have put around lower key BBC role + 50% of my income going to UK taxman, not the deciding factor."
The BBC will only air "key races" from next year in a move that has angered many Formula One fans.
The corporation recently announced the ten Formula One races that it will show live next season, with presenter Jake Humphrey confirming that he is sticking with the BBC.