Three of the four-strong brand amplification team will depart, with Verity Henderson, senior PR and brand campaigns manager, remaining.
Ellie Tory, head of brand advertising and sponsorship at Virgin Media, will take on responsibility for amplification.
She said: "The changes being put in place are to ensure we are able to respond to the competitive environment with greater speed and agility than we previously have, through streamlining the organising at the top.
"I am delighted by these opportunities for the combined advertising, brand amplification and sponsorship team, and confident that we can continue to create exciting, memorable and shareable experiences. This of course will include V Festival and our sponsorship of the Commonwealth Games in Glasgow next year."
Speaking exclusively to Event, Dornan said: "I am incredibly proud of what I've done over the past seven years. I'm delighted to have been able to challenge and change thinking around the delivery of brand messages, and thrilled to have delivered so many ‘Virgin touches’ to events and occasions."
Dornan has worked for the Virgin brand since joining Virgin Megastores in 1996. Some of his standout successes at Virgin Media include transforming the House of St Barnabas into a members’ club for Virgin employees; re-creating the Shire in the New Forest to stage a screening of The Hobbit; and delivering the V Festival’s Louder Lounge, which will celebrate its tenth anniversary in 2014.
"I hope the new owners [Liberty Global] will continue to use the V Festival to deliver their biggest PR hit through the Louder Lounge experience, to remind people that entertainment is at the heart of what they do," said Dornan. "I hope they break new ground in their delivery of activations around the Commonwealth Games sponsorship, and that they spread their love among the several agencies lined up to work on the Games. And of course, I hope they embrace what's only just started in how they go about amplifying ATL campaigns, and open their eyes to the opportunities available outside of traditional advertising."
Dornan said he is exploring options for 2014. He has been offered come consultancy work with a new event business, and said he feels "incredibly enthused" about the new year.
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