Xavier De Kestelier is an architect and design innovator, and a Head of Design at Hassell. With over two decades of experience, he leads in computational design, digital fabrication, and additive manufacturing, pioneering projects across architecture and extreme environments. A trailblazer in space architecture, he has collaborated with NASA and ESA on sustainable space habitats. His expertise in parametric design and digital construction drives industry innovation and research. Formerly Director of Smartgeometry, he helped build a global network in computational design. Xavier has also taught at Syracuse University (London), the University of Ghent, and The Bartlett (London), mentoring the next generation of architects. His socially impactful work includes leading the design of the Bidi Bidi Performing Arts Centre in one of the world's largest refugee settlements