The collaborative work of Karel Boonzaaijer + Pierre Mazairac began at Pastoe, where they worked together on various furniture designs, including the L‑160 furniture series. In 1980 they founded their own design company, Boonzaaijer and Mazairac and Partners, where they specialized in industrial design and architecture. Their design philosophy focuses on creating furniture that is a component of the overall architecture of a space. Together they are known for their functional seating and for the stunning work they create for a variety of clients. Collaborations and client work included Pastoe, Hennie de Jong, Leolux, Metaform, Castelijn, Arco, Apage, and IKEA.
The Vision Storage System designed by Karel Boonzaaijer + Pierre Mazairac for Pastoe is perhaps the most comprehensive modular cabinet storage system ever created.