Masteller was born in Los Angeles growing up in the Silver Lake district. His paintings are in the public collections of The Palace of The Legion of Honor, Achenbach Collection. San Jose Museum of Art, Santa Cruz Museum of Art and History, Palm Springs Museum of Art, Crocker Art Museum, Triton Museum of Art and the Monterey Museum of Art. He began painting as a teen and is mostly self-taught. During the 1960s his work was figure based and focused on portraits and abstracted landscapes. During the 1970s he moved toward a more surreal style in the manner of Rene Magritte and the Italian abstract artist Alberto Burri who influenced his use of cut and found fabrics often hand stitched to the canvas surface. In the 1980s he incorporated elements of architecture - pillars, cracked walls, arches and for a brief period illusionism. During the 1990s he returned to abstraction the figure and intuitive landscape.