When he returned in 1946, his painting moved quickly toward abstraction. From 1947-1949, he studied post-Cubism at the Hans Hofmann School of Fine Arts. In 1948, he joined the Spiral Group, an organization of artists devoted to the exhibition of experimental art. The Artists Gallery in New York hosted his first one-man show in 1949, and one year later, he enrolled at the Atelier Leger in Paris. In 1956, he began teaching in the United States. By 1985 he had been an instructor at the Portland Museum School, University of California at Berkeley, and the School of the Visual Arts, NYC.

His works are in the collections of prominent institutions such as the Whitney Museum of American Art, the Guggenheim Museum, and the Philadelphia Museum of Art. Most recently, his work was featured in an exhibit at Anita Shapolsky Gallery. In 2008 the McCormick Gallery and Vincent Vallarino Fine Art mounted an exhibition and published a catalog with an essay by April Kingsley on Loew’s work.