Sébastien Cailliau is a core member of the Aerospace and Defense sector at Boston Consulting Group.

He has served European aerospace and defense companies across all levels of the value chain—from prime contractors to raw material providers. He has also worked with government entities and European institutions.

Sébastien’s work with clients has included corporate development topics such as growth, market entry strategies, and M&A; and performance improvement programs including transformation and global competitiveness programs, program management and engineering efficiency, manufacturing, and supply chain management. He has helped define public policies at national and regional levels.

Prior to joining BCG, Sébastien was a partner at Roland Berger Strategy Consultants and a consultant at CSC Peat Marwick.



  • Master’s degree, engineering, Ecole nationale supérieure de l'Aéronautique et de l'Espace
Deep Expertise, Broad Experience