Sunseri studied the art of bronze patina with sculptor, Victor Zaikine, and opened his own business, Phoenix Studios, finishing bronzes for artists Loet Vanderveen, Beth Garcia and Malcolm Moran. Moran hired Sunseri to oversee the making of his commercially successful sculptures and Sunseri also finished bronzes for the Bennett Brothers at their foundry in Placerville.

Always a working artist, by 1983, Sunseri had created two types of sculpture; one for fine art galleries and one for gift shops. His direct metal works were shown in: Highlands Sculpture Gallery, Carmel, Kersting Gallery, Sausalito, Don Cunard Gallery, San Francisco, Christopher Bell Collection, Monterey, Smith-Cosby Gallery, Carmel, John O. Thomson Gallery, Monterey, and Frank Sunseri Sculpture, Cannery Row, Monterey.

In 1986, he embarked on a transition into the reduction method of sculpture, creating works in alabaster and marble. Driven to find the special forms within each stone, Sunseri works into the early morning hours with hammer and chisel, rasp and file. Stone sculpture is physically demanding, so he relaxes by creating free-form oil paintings in his studio at the Pacific Grove Art Center and writing poetry, aphorisms and humorous essays. His journal chronicles the artist’s life from student days, through serving in the US Air Force (1968-1972), to the present and is often written in the mysterious “Da Vinci Code” of mirror writing.