He pursued his education at the State Art Institute of Cantù and later graduated in architecture from the Politecnico di Milano. In 1970, he co-founded the design studio Udacanturiodesign with architect Enzo Pozzoli, focusing on industrial design and architecture.

In 2012, Giuliano established Giuliano Cappelletti & Partners, collaborating closely with his son, Gabriele Cappelletti. Their multidisciplinary studio, located in a medieval building that was once part of the Carimate castle complex built in 1345 AD, engages in product design, interior design, and architecture. That same year, they expanded their international presence by opening a studio in Shanghai, undertaking projects in architecture and interior design.

Throughout his career, Giuliano has collaborated with leading furniture companies, working closely with local craftsmen from his native region. This collaboration has significantly influenced his design approach, blending traditional craftsmanship with contemporary aesthetics.

His work has been recognized with several awards, including the selection for the XVI Compasso d'Oro for the sink "Lavando," produced by ABC Cucine. Giuliano Cappelletti's designs are characterized by their elegance, functionality, and a deep respect for materiality, reflecting the rich heritage of Italian design.