Cargill has held the same role at Cheil for the past two years and before this was at Fallon London working with consumer brands including Nokia, Eurostar and Asda. Major projects include the Nokia Lumia launches with Deadmau5 in London and New York. He was also creative director at private members club The Hospital Club for six years and previously worked in marketing at Channel 4.
Cargill replaces Joe Sinclair who resigned from the role in October last year, following managing director Misha Dhanak.
In his new role at Citizen, Cargill will oversee all creative output from the agency, working closely with the agency’s new managing director Mark Cater.
Cargill said: "It’s a great time for communication. On one hand YouTube has become a landfill for pointless content, everything we see appears to be 'authentic' and consumers are falling in and out of love with brands in seconds.
"But on the other they are seeking tangible, emotional connections with brands, they are self-segmenting in an effort to ‘get it’ and their voice just becomes more and more powerful. At Citizen I look forward to creating platforms for clients that deliver real, meaningful and long-lasting experience for their consumers."
Cater added: "Hiring a new CD has been among my top priorities since joining Citizen. Today’s agencies live or die on the strength of their creative output. Generating genuine cut-through is getting harder and effective creative is – I believe – the most effective way to do this. Plus, as well as working across clients, Duncan will be helping me develop a direction for the agency as we move into an ambitious period of growth."
Last month Citizen was bought by China's Blue Focus.