Matthieu started his advertising career in 2012 as a social media manager before quickly rising to lead the department at Fred & Farid Paris at 27. However, his passion for creativity led him to transition to the agency's creative side.

After starting over as a copywriter at Publicis Group, Matthieu joined BETC Paris a year later, where he has won Lions as a copywriter for five consecutive years (2019–2024), amassing over 100 awards at major advertising festivals. His work has been featured in renowned international media such as The New York Times, The Guardian, and El País.

Having learned from advertising legends like Stéphane Xiberras and Farid Mokart, Matthieu now serves as Creative Director at BETC Paris, leading creative activations across various sectors and clients.