Seattle-based Medio Systems said Tuesday that it has named Omar Tawakol to the position of Chief Advertising Officer. Tawakol joins the firm from Revenue Science, where he held the position of Chief Marketing Officer. Tawakol has also served at CoRelation and Liberate. Medio Systems is a provider of mobile search applications. Medio is backed by Dot Edu Ventures, Frazier Technology Ventures, and Mohr, Davidow Ventures. More information »