Grillo was born in Lawrence, Massachusetts and studied at the Hartford Art School, 1935-1938; California School of Fine Arts, 1945-1947; with Hans Hoffman in New York and the Hans Hoffman School of Fine Arts, Provincetown, Massachusetts, 1948-1951. Grillo remained active in Provincetown, Massachusetts during much of his career.
He received the Ford Foundation grant to work at Tamarind Lithography Workshop, Los Angeles, 1964 and the Ford Foundation artist-in-residence grant at Butler Institute of American Art, Youngstown, Ohio, 1964. He taught at the New School for Social Research, New York, 1964-1966 and the University of Massachusetts at Amherst, 1967-1991.
Solo Exhibitions: Artist’s Gallery, NYC, 1948; Tibor de Nagy Gallery, 1953; Bertha Schaefer Gallery, 1955, 1957, 1959; Howard Wise Gallery, 1961, 1962, 1963; University California, Berkeley 1962; and University of Massachusetts, 1988
Selected Group Exhibitions: The Oakland Museum, California. A Period of Exploration: San Francisco 1945-1950; 1973 (Askart.com)