Martin joined joined BBH in April 2016 after 14 years in Australia. She has spent the last year working on the agency’s Tesco account, which she will continue to oversee alongside her new management responsibilities.
Her appointment comes on the back of a tough 2016 for the agency. A senior management drain included the departures of managing director Mel Exon, chief strategy officers Jason Gonsalves and Jonathan Bottomley, and deputy executive creative directors Caroline Pay and Rosie Arnold.
Martin will now share operational management tasks with managing director Adam Arnold, who was promoted to fill the void left by Exon.
Arnold said: "What Karen has accomplished since arriving at BBH is incredibly impressive and this promotion is very deserved. I’m delighted to have Karen as a partner, she is nothing short of awesome. Or, to borrow her favourite descriptor, 'deadly'."
Martin, under whose stewardship the Tesco account won Campaign’s Brand Story of the Year, added: "I’ve been a fan of BBH for years and the past 12 months have confirmed that the agency is a perfect fit for me."
BBH scored a six in its most recent Campaign school report, published earlier this month. Last year the creative agency won 12 accounts such as Pernod Ricard (Absolut), Experian and Uber, and lost two accounts, Clarks and Ladbrokes.