Claudia Sestini

Global CMO, Gain Theory

Claudia is the Global CMO at Gain Theory, a global marketing effectiveness consultancy. As an award-nominated marketer, she lives by the ethos that marketing is the driver of long-term sustainable growth. 

Over the past 20 years Claudia has developed, launched and sustained brands across various sectors and commercial models: Entertainment at MTV Networks; agency at WPP; and publishing at Time Inc, Bauer Media and Dennis Publishing.  

Previous to Gain Theory, Claudia headed up Marketing & Digital Media at MTV Networks where she launched Comedy Central into the UK market. In her tenure she developed the brand, spearheaded multi-channel marketing campaigns and lead digital media across multiple platforms such as the download-to-own portfolio including South Park. 

Having read social psychology at university, Claudia is passionate about illiciting consumer behavioural change through consumer insights, storytelling and innovation. 
Claudia spent her childhood between Florence, Italy and Cairo, Egypt and now resides in London with her family. When she isn’t traveling the world connecting with Gain Theory people and hosting CMO events, she spends her time creating culinary experiences for her tribe of friends and family. 


Shawn O’Neal knew he should speak up but froze. He was a junior exec and didn’t want to upset the