He generally played gentle, urbane, rather fussy, sometimes obsequious and shifty characters, often with a concealed edge of malice. Tobin also played as Alexander "Sandy" Lord in the original Broadway production of Phillip Barry"s The Philadelphia Story, thus starting his career on stage in 1939. The Internet Movie Database lists 96 television and film acting roles for Tobin over a career spanning from 1939 to 1977.
He became a regular during the final season of Perry Mason as the proprietor of "Clay"s Grill".
He made a prior appearance in 1964 as Dickens the butler in "The Case of the Scandalous Sculptor.".