He appeared in the role of Dr. Chauncy Hartlund in the 1965 Perry Mason episode, "The Case of the Carefree Coronary." In 1966, Montaigne portrayed the Romulan Decius in the Star Trek episode "Balance of Terror".
Montaigne's acting career included roles such as Dr. Chauncy Hartlund in the 1965 Perry Mason series episode, "The Case of the Carefree Coronary," and the Romulan Decius in the 1966 Star Trek television show episode "Balance of Terror."