Cergoly began his literary career in the 1920s. He founded an artistic circle known as the Circolo del Magalà, which organised performances at the Circolo della Marina Mercantile in Trieste. In 1928, he published his first poetry collection, Maaagaalà, clearly influenced by Futurism, adopting the pseudonym Sempresù. He continued to write in both Italian and the Triestine dialect, producing mainly poetry, as well as plays for theatre and cinema and essays for specialist journals. After the war, he turned to journalism, becoming editor-in-chief of Il Nostro Avvenire and a founding member of Il Corriere di Trieste, where he was responsible for its artistic and literary direction.