Kristina Lassus was born in Helsinki in 1966. She graduated from the University of Industrial Arts of Helsinki (UIAH) with a Master of Arts (MA) in Design Leadership in 1992. This was followed by postgraduate studies in product development at the Helsinki Polytechnic in 1993, and her second MA in Interior Architecture and Furniture Design from the UIAH in 1995.

After working in renowned interior architecture agencies in Finland and Australia, she developed her first product designs for the Italian design firms Alessi, Poltronova and Zanotta.

Her specialisation in design management and product development lead to managerial positions in international furniture and product manufacturing firms. She worked as Design Coordinator for Artek Oy Ab, Finland (1994-97) and as Design Manager for Alessi SpA in Italy (1998-2004). After six years in Italy, in 2003, she founded Kristina Lassus Studio.