His secular work includes the Roger Williams Park Museum of Natural History and Planetarium in Providence, Rhode Island and the Château Dufresne in Montreal.

St. John the Evangelist Anglican Church in Prescott, Ontario is home to Nincheri's "Lost Window", depicting the nativity and signed by the artist.

Listed in their records simply as St John's Church, Prescott, curators assumed the window was in the counties of Prescott-Russell near the Quebec border but could not find it.

When the chapel and adjacent hall were sold, the congregation had the window refurbished and moved into the main church worship space.

[2] For his work at the Roger Williams Park Museum, which was donated without charge, the city of Providence named Nincheri an honorary citizen.