Billy was born in Aix-en-Provence in 1982. He studied at the School of Architecture in Marseille, where he got his master's degree in 2007. Since then, Billy has worked in internationally acclaimed offices in the Netherlands, Austria, and Switzerland on various projects, gaining a good overview on international architecture. In 2015, he returned to Marseille to co-found his own office, CALMA, which bases its approach on context and historical precedents as well as local materials, craftsmanship, and archetypes. He taught at ENSA Marseille in 2011 and 2016, and has pursued an executive master's degree in real estate development. His passion for architecture and the city has led Billy to travel the world to witness its marvels first hand, and he is excited to share his culture and understanding of the south of France region with foreign enthusiasts.