In 1965 Deckard had his first major exhibition, A New Generation of American Printmakers. During 1965-1967 was Deckard's most active period, during which he exhibited his work widely, including at the Brooklyn Museum, De Cinque Gallery, the Museum of Art at Penn State University, and the Mickelson Gallery in Washington, DC.
Though early on he demonstrated facility with the different media of drawing, painting, printmaking and sculpture, by the 1970's sculpture had become his primary means of expression. His work are in a number of private and public collections.
