Posnanski (pictured right) founded avVenta, a digital agency acquired by Accenture Interactive (now Song) in 2012, later becoming a senior executive, while Brown (pictured left) founded MediaSense in 2009.

Posnanski takes over MediaSense at a time when the company has acquired creative and media advisory specialists R3 and PwC’s media advisory team, with staff numbers at more than 230 worldwide.  

Brown said: “I am delighted to have found my successor and am excited to have attracted such a talent as Jamie to MediaSense.

“His strategic vision and proven leadership skills, combined with his wealth of experience and integrity make him the ideal person for this role. 

“I am looking forward to supporting Jamie as we grow our global presence and build more expansive and innovative services for our global client base.” 

Posnanski added: “I am thrilled to join the talented team at MediaSense and build upon such an impressive legacy.

“With the addition of PWC’s media unit and now with the R3 acquisition, I believe we are incredibly well positioned to help clients fuel growth by optimising returns across an even broader scope of media and marketing investments.”