The Piccirillis' workshop garnered them commissions to carve other artists' designs. They carved marble sculptures designed by John Quincy Adams Ward, Augustus Saint-Gaudens, and R.I. Aitken. The Piccirilli studio won the commission for the monument to the Battleship Maine (at the southwest corner of Central Park, dedicated in 1913). This was followed by a more important commission — to carve the statue of Lincoln designed by Daniel Chester French for the Lincoln Memorial in Washington, DC (dedicated 1922). Attilio designed the World War I monument in Albany, NY, and made it in their workshop. In 1931, Attilio carved a bust of Thomas Jefferson for the state capitol in Richmond, VA. He modeled the bust after an earlier version by Jean-Antoine Houdon.

The family continued to create the exterior sculptures for New York landmarks: the Brooklyn Museum of Art, the New York Stock Exchange; the pediment sculptures for the U. S. Customs House at Battery Park; the lions in front of the New York Public Library; City Hall Park; and a frieze for the Life Building at Rockefeller Center.

The brothers, and particularly Attilio, were respected members of the Italian-American community; Attilio dined with Enrico Caruso, the famous opera tenor, at the home of Fiorello LaGuardia. He was president of the Italian-American Art Association, a fellow of the National Academy of Design, and founded the Leonardo da Vinci Art School, to which he devoted great energy over the years. By the 1930s, the number of sculpture commissions dwindled, in part due to the Depression, but also because of changing taste. Public sculpture simply fell out of favor.

The 'family seat' in the USA was their home and workshop at 467 E. 142nd St. As was the practice at the time, the extended family lived together at this location. Attilio and his brother Getulio died within three days of each other in 1945. The Piccirilli studio was demolished sometime in the 1960s, and the documents and possessions of the family have disappeared.