The Kent-based Nexus/H was chosen after a four-way pitch that took place in September. It included incumbent agency Quirk, as well as Mad River and Weapon7.
The agency will now work with Miller Genuine Draft on digital creative strategy across all markets, as well as community management on social media platforms and fan acquisition.
Nexus/H will start managing the brand’s community this week. It will also activate the digital element and media planning and buying for the brand’s annual Miller Music Tour event, which will go live in April next year.
Tom Poynter, the managing director of Nexus/H, said: "The engagement will enable us to demonstrate the true value of having creative and media services within a sole agency and operating at a global level.
"The brand and clients’ ambition to reach a very specific online audience, through brave creative work and leading-edge technology, is very motivating."