He attended the Music and Arts High School in New York City until he was awarded a scholarship to study at the Art Students League of New York with Frank DuMond.
In 1951, he began teaching at the Art Students League. His painting, the Resurrection of Christ, can be seen in Old St. Patrick’s Cathedral in New York. In 1962, he received a commission to paint eight large paintings of the Life of St. Anthony of Padua, which were permanently installed in the 11th Century Church of San Giovanni de Malta, in Venice, where his paintings hang alongside a painting by Giovanni Bellini.
He became the first painter to receive the honor since Caravaggio. In response to the overcleaning of the Sistine Chapel, Mason, along with James Beck, professor of art history at Columbia University, helped form the organization, ArtWatch International. Mason served as President of the National Society of Mural Painters for the 1995-96 year.
He died in 2009. A full-length documentary film produced by Maestro Films premiered at the Big Apple Film Festival in New York City on November 3, 2011.
Served with Army of the United States, 1945-1946. Member National Academy of Design (past treasurer), National Mural Society, Allied Artist American, Auduson Artists, Hudson Valley Artist Association, Royal Society Arts, Salamagundi Club.
Married Anne Cary Crosby, March 12, 1966. 1 son, Arden Harriman.