In 1960 he signed the Nouveau Réalisme Manifesto and later took part in the group’s events. The following year he visited New York for the first time, held a solo exhibiton at the Cordier-Warren Gallery, and participated in the The Art of Assemblage exhibition at the Museum of Modern Art. He produced a number of different sculptural series throughout the 1960s, including Coupes (sawn and sliced objects), Colères (broken or damaged objects), Combustions (burnt objects), and Inclusioni, (assemblages of objects submerged in transparent polyester resin). During this time, he exhibited at the Stedelijk Museum, Amsterdam in 1964, and at the 1968 Venice Biennale.
The artist received major public commissions, such as the bronze monument A la République (1984) for Paris’s Palais de l’Elysée, and the monumental Espoir de Paix (1995) in Beirut, an assemblage of cement and tanks. Toward the end of the 1990s, Arman’s artistic practice took a somewhat radical turn, resulting in the production of large-scale etchings and drawings and collaborations with poets and writers. He was the subject of several exhibitions. Arman died in New York on October 22, 2005.