Feld often played the part of a maître d', but also a variety of aristocrats and eccentrics; his characters were indeterminately European, sometimes French and sometimes Belgian but always with his particular mannerisms. In the 1938 screwball comedy Bringing Up Baby he played the role of Dr. Lehman. In 1939 He appeared with the Marx Brothers in At The Circus in the small but memorable role of French orchestra Conductor Jardinet. In one 1967 episode of The Man from U.N.C.L.E., "The Napoleon's Tomb Affair", Feld played a banker, a beatnik, a diplomat and a waiter. The episode also featured Ted Cassidy from The Addams Family. In his later years, Feld appeared in several Walt Disney films and also played an uncharacteristically dramatic role in Barfly. In addition to films, he acted in numerous television series in guest roles, including the recurring role of "Zumdish", the manager of the intergalactic Celestial Department Store on Lost In Space, in two Season 2 episodes, The Android Machine and The Toymaker. Zumdish returned in the Season 3 episode Two Weeks In Space, where he has been brainwashed by bank Robbers into believing he is a tour Director taking the Robbers on holiday. He also portrayed one of the Harmonia Gardens waiters in the movie Hello Dolly!