• by Joe Mandese  @mp_joemandese, September 28, 2009

Donovan Data Systems, the dominant provider of back-office media buying systems for advertising agencies, this morning announced it has signed a new, multi-year agreement with Omnicom Media Group. The deal, which includes Donovan's new iDesk digital ad campaign management, and BrandOcean workflow systems, is the second major agency holding company renewal struck by Donovan this year.

Earlier this year, Interpublic's Mediabrands unit signed a new long-term agreement with Donovan, following a protracted review that evaluated several other media buying processing systems providers, including MediaBank.

Terms of the new Omnicom deal were not disclosed, but Donovan said it covered all of Omnicom Media Group's businesses in the United States, Canada, Germany, Ireland and the United Kingdom.