Brewer joined the WPP agency last week after two years at BBH, where he worked on brands including Lynx/Axe and Robinsons.
Before that, he spent four-and-a-half years at DDB UK and Adam & Eve/DDB (following the merger in 2012), where he produced silver Cannes Lions-winning work for Harvey Nichols and other award-winning campaigns such as the Volkswagen film series "Made for real life, not the movies".
Brewer told Campaign that he had been attracted to CHI by the agency’s collaborative working practices.
"In advertising and creative at the moment there’s a lot of time pressure, which can make people work with their head down and not interact as much as they possibly could," he said.
"Here, the way they’ve approached those pressures is to get people working more closely together, including with both younger and more senior colleagues."
Brewer added that CHI’s involvement in boundary-pushing work like the "Slide" campaign for Lexus, which demoed the automaker’s hoverboard, was another enticing prospect. That work picked up the UK’s only gold in this year’s Cannes Cyber Lions.
He said: "The desire to do that non-traditional, more lateral stuff, that’s also attractive. They’ve picked up that Cyber Lions this year and that’s a good basis for a future relationship."
Brewer is reporting into CHI & Partners' creative partner, Micky Tudor, who is deputising as the agency's lead creative following the departure of chief creative officer Jonathan Burley in May.
Tudor hailed Brewer’s past work as "transformative" for his clients and added: "His track record for blending PR and content-driven ideas with world-class advertising craft makes him a perfect fit for CHI & Partners."