Will Fernandez is the Co-Founder of Defyner, a brand engineering company redefining how the world’s most ambitious brands think, work, and grow in the agentic age.
At Defyner, Will and his team of forward-deployed brand engineers help turn traditional marketing operating models into agentic operating systems, solving complex marketing and growth challenges for leading brands like GEICO, Zillow, and ServiceNow.
Prior to Defyner, Will spent nearly a decade at WPP, where he became the group’s youngest-ever EVP and Global Client Lead, leading the network’s global agency relationship with Amazon as an advertiser across 32 markets.
He is currently based in London, with his wife and two boys, and is a proud Trustee of The Children’s Society, one of the UK’s leading children’s charities.

