The in-office policy was updated in November, when Omnicom acquired Interpublic Group.
Sobhani is currently president and global chief creative officer at DDB Worldwide.
Move comes after Omnicom acquired IPG last week.
The new role is designed to 'solidify leadership in applied AI'.
Analysis of the IPA Databank finds budget is eight times more important than ROI when it comes to driving effectiveness.
EssenceMediacom was incumbent on media, while IPG's MullenLowe held creative duties in Europe, alongside Omnicom's BBDO in the US.
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