
Directing
Elseen Leo Ralph Nelson (August 12, 1916 – December 21, 1987) was an American movie and television director, producer, writer, and actor.
Description above from the Wikipedia article Ralph Nelson, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Soldier Blue
as Agent Long

… tick… tick… tick…
as New York driver caught in speed trap (uncredited)

Charly
as Convention Speaker (uncredited)

Duel at Diablo
as Col. Foster
The Background Beat
as Self

Lilies of the Field
as Mr. Ashton (uncredited)
The Man in the Funny Suit
as Self