Sebastián Irarrázaval is a renowned Chilean architect and a RIBA International Fellow, trained at the Pontificia Universidad Católica de Chile and the Architectural Association School of Architecture in London.

Born in Santiago in 1967, he received his professional degree in architecture in 1991. In 1993, he was awarded a British Government scholarship to pursue postgraduate studies in Urban Design at the AA in London.

Since 1994, Irarrázaval has been a design studio professor at the School of Architecture at the Pontificia Universidad Católica de Chile. He has also served as a visiting professor at prestigious institutions such as the Massachusetts Institute of Technology (MIT) and the IUAV (Istituto Universitario di Architettura di Venezia).