Robert Armetta has studied extensively throughout the United States and Europe, at schools including Columbus College of Art and Design, the Pennsylvania Academy of Fine Art, Atelier Lack, the Florence Academy of Art, the New York Academy of Art, and the Water Street Atelier.

He has exhibited at the Allen Sheppard Gallery, Grenning Gallery, Arcadia Gallery, John Pence Gallery, and Seraphin Gallery, and at the National Academy of Design, in New York City, and the Fort Wayne Museum of Art, in Indiana.

He has taught drawing and painting at the University of Long Island, Southampton, and currently teaches drawing and painting at the New York Academy of Art and the Long Island Academy of Fine Art, in Riverhead, New York, which he founded in 1999. His own studio is in Brooklyn, where he lives with his wife and daughter.