After five years, in 1945 she moved to the United States training with Martha Graham, Hanya Holm, Louis Horst, and José Limón[4][5] to perfect her craft.

Returning to Argentina in 1947, Itelman began choreographing and performing solo work, and created a modern dance studio in 1950 to develop her own company.

[8] Simultaneously with her teaching, Itelman continued her own training with Merce Cunningham and Alwin Nikolais, among others, and studied lighting and makeup at the Dramatic Workshop run by Erwin Piscator.

[5][11] In 1970, Itelman founded the Café Estudio de Teatro Danza and began developing both creative and educational aspects of dance theater.

Between 1977 and her death, she created choreographies of works which have become iconic pieces for the Workshop, including: El capote (The cloak), Historia del soldado (History of the soldier), Las casas de Colomba (The houses of Colomba, inspired by Tennessee Williams's iconic play A Streetcar Named Desire), Paralelo al horizonte (Parallel to the horizon), Suite de percal (Suite of percale) and Y ella lo visitaba (And she visited it).