mediasense Appoints Sam Tomlinson as CEO
mediasense has appointed Sam Tomlinson as CEO, reinforcing its ambition to remain the industry’s most trusted independent marketing advisor.
London, UK – Tuesday, 7 July 2026 – mediasense today announced the appointment of Sam Tomlinson as Chief Executive Officer, succeeding Jamie Posnanski, who has returned to the United States to focus on personal commitments.
Tomlinson joined mediasense in 2024 as Chief Client Officer following the acquisition of PwC’s UK Marketing & Media advisory business, which he founded and led. With over 25 years’ experience advising senior marketers and major advertisers, he is recognised for his work across marketing advisory, governance and transformation.
Graham Brown, Founder & Director of mediasense, said:
“When we welcomed Sam and his team into mediasense in 2024, we brought one of the industry’s most respected marketing advisory leaders into the business. Since then, he has had a clear impact on our clients, our people and our strategic direction.
Sam brings strong commercial insight, deep client knowledge and a very clear view of where marketing is heading. The Board is confident he is the right person to lead mediasense and delighted he has agreed to take on this role.
I would also like to thank Jamie Posnanski for his contribution to mediasense and wish him all the best for the future.”
Sam Tomlinson, Chief Executive Officer of mediasense, said:
“Joining mediasense was an easy decision because of the quality of its people, clients and independent perspective. Over the past two years, I have seen first-hand the ambition of this business and the opportunity ahead.
Marketing is entering a new era. AI, changing operating models and rising demand for accountability are reshaping how organisations plan for, make decisions and implement transformation. Marketers need clear, independent advice, now more than ever and mediasense is well placed to help them navigate that change.
I’m honoured to lead the business built by Graham Brown, Andy Pearch, Greg Paull and Shufen Goh, and excited to work in partnership with Ryan Kangisser and the rest of the leadership team to continue building the industry’s most trusted independent marketing advisor.”
The appointment takes effect immediately.
Press Coverage: AdAge | Campaign | MARKETING-INTERACTIVE
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