The 25-year-old brings a wealth of experience to the French-based Tech 3 Team having proven to be one of the fastest and most consistent performers on the grid since his MotoGP debut in 2008.
Five podium finishes, including four second places in 2011, have put Dovizioso in a fantastic third place in the World Championship standings with just three races remaining.
The Italian, who was 125cc World Champion in 2004 and twice runner-up in the 250cc class, will join Cal Crutchlow at Tech 3 for the hugely anticipated first season of the new 1000cc MotoGP era, which kicks off in Qatar on April 15, 2012.
I'm happy to have reached this agreement with Tech 3 for next year and I want to thank Herve Poncharal for the opportunity he is giving me. I am excited to become part of Herve's squad and to be teamed with Cal. I am sure this new challenge will be exciting, motivating and fun. Now that 2012 is sorted I want to focus on finishing the season in the best possible way."