His paintings have been exhibited at the Museum of New Mexico, the Los Angeles Museum of Art, the Greek Theatre of Los Angeles, the de Young Museum and the Walt Disney Family Museum of San Francisco.
He participated in art shows for the city of Los Angeles, Laguna Beach, the Walnut Creek Festival, the Palace of the Legion of Honor, the Pasadena Art Museum, the national Academy of Design, and the Sierra Madre Library. He has had one-man shows at the Lone Galleries of Los Angeles, the Ruthermore Galleries in San Francisco and the Carmel Highland Gallery in Carmel.
He was elected as a Fellow to the International Institute of Arts and Letters. He was a member of the Academy of Motion Picture Arts and Sciences, the Laguna Beach Art Association, the Carmel Art Association, and the honorary art fraternity Delta Phi Delta.
Josh's art was widely collected, and among some of the more notable collectors included Walt Disney, George Montgomery, Fred McMurray and President Lyndon Johnson. Just prior to his death in August of 1965, Josh was named to be the artist to do a portrait of the first astronauts returning from landing on the moon. His untimely death did not allow him the honor of fulfilling this honor.