Gee will lead the agency’s NowLab, its global technology unit. Isobar UK said the new role will help "unify innovation, brand commerce consultancy and future trends and insights capabilities" into the NowLab.
Before joining R/GA in 2011 as group director for production, Gee had freelanced at AKQA. He has also worked at WCRS.
He will report to Steven Moy, the chief executive at Isobar UK. Moy said: "At Isobar we believe in ideas without limits. We are committed to connecting the power of brands with the power of technology to create exceptional brand experiences and speed to value for our clients.
"I am delighted to welcome Matt to the team. He brings with him significant expertise in leading clients into new territories and is renowned for helping multi-market and local brands transform through innovation.
"He is a huge asset to the team and further enables us to be best-in-class in the brand commerce era."