A graduate of SUPAERO in 1999, Julien began his career as an IT Architect at Sema Group, then at agency.com. He joined SQLI in 2002 before moving to Weave in 2006 as a Senior Manager. In 2012, Julien was appointed as a partner at Weave, responsible for Enterprise Architecture and Technological Innovation issues.
Julien became a partner in architecture following the merger with Weave in 2018.