The appointment, which is effective immediately, will see her take a primary role in running the agency and expanding the business.
She said: "Unity is a terrific agency, with an incredibly talented team that strives to continually break the mould in consumer communications, and I’m delighted to have a key role in its continued success."
Doran, who has 15 years of comms experience, accepted a permanent role as a director on Unity’s board last year and has since delivered award-winning campaigns for Hyundai, Diageo and the portfolio of GSK brands, the company said.
Previously, Doran worked as a freelance consultant for Penguin and oversaw delivery of Samsung’s Olympic Torch Relay tour in the summer of 2012.
In her last permanent role, Doran was head of experiential and board director at Cake Group.
Hopkinson and Done will work closely with Doran as well as developing new products for clients.
Hopkinson said: "Our decision in appointing Davnet to this role is based on her outstanding commitment to our business values and our combined mission of driving growth – while making it a great place to work and nurturing and developing staff."