Field will primarily be responsible for O2's content strategy across its O2 Active, i-mode and Visual Radio platforms. She will also plan the company's core music strategy, and maintain its market position with regard to its new content media.
In her previous role at Discovery Networks International, Field was vice-president for new media, and oversaw the company's broadband strategy and European business plans for web and Wap.
Field also assisted in the production and implementation of the first series of Discovery's enhanced programmes and documentaries across its various media platforms.
Prior to joining Discovery, Field worked was a general manager at BSkyB, running its gaming and interactive businesses.
Russ Shaw, marketing director at O2, said: "New content remains key for our customers and Tanya will help maintain O2's momentum in this field.
"She brings to O2 a strong and extremely diverse background in content development and her experience in television will help us to continue to develop compelling content."
Field will also oversee the development of live music and events from the rebranded Millennium Dome, dubbed The O2, which is set to open in April 2007.
The much-maligned lottery-funded dome, which cost £758m, will be redesigned to include a British music hall of fame, a 1,800-seat theatre and 2,200 capacity music club.
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