When is the contract with greg Zipadelli over with joey?

ZipaDELLi spent 10 years as Stewart's crew chief at Joe Gibbs Racing. They won Sprint Cup championships together in 2002 and 2005. But when Stewart left in 2009 as co-owner of Stewart-Haas Racing, ZipaDELLi stayed at JGR, where he is under contract through 2012.