Ricardo Seixas is the founder of One Day Agency, an integrated agency based in Manchester, London, Paris and Berlin. He is an advertising executive and entrepreneur with over 20 years of experience across the digital and marketing space, having worked with major consumer brands, tech companies, start ups and global agencies across four continents.

Based in Manchester, Ricardo founded One Day Agency in 2019 with the ambition of building a truly integrated, no silos agency that brings creative, media and digital together under one roof. Under his leadership, the agency has grown rapidly, delivering international campaigns across Europe and beyond, earning Top 50 Integrated Agency recognition, and working with brands ranging from tourism boards to global consumer names.

Ricardo’s work has been recognised across the industry through multiple awards and accolades. Under his leadership, One Day Agency has won international honours including Global Biddable Agency of the Year and Best Use of Research, and has been named one of Prolific North’s Independent Agencies to Watch. The agency is consistently recognised for its integrated approach, research led thinking and ability to deliver measurable results at scale.

Alongside agency growth, Ricardo is known for his strong point of view on the future of advertising, particularly around integration, senior led delivery and the role of technology and AI in creative and media. With a background spanning engineering, communication design and business, he blends analytical rigour with bold creative thinking, remaining hands on in strategy, innovation and growth while shaping One Day Agency as a modern, international alternative to traditional network agencies.