Ir. arch. Stijn Elsen is a voluntary academic collaborator at the Vrije Universiteit Brussel (VUB) and co-founder of the architecture office KADERSTUDIO. Both in his projects and for the research team TRANSFORM he conducts research towards more flexible and reversible building systems. His expertise in practice is an added value to several research projects, such as for the Brussels Retrofit XL platform. Stijn Elsen obtained a Master of Architectural Engineering at the Vrije Universiteit Brussel in 2007. After his studies he worked at Meta architectuurbureau in Antwerp where he was project architect of several small to big scale projects.