[3] His studies were interrupted by World War II, however, when he served in the United States Army Air Forces.

[2] Kennedy began his career after he emigrated to France, in which he made numerous appearances in stage plays.

[7] He guest-starred in television programs including Gunsmoke, Frontier Circus, Schlitz Playhouse of Stars, Lock-Up, and Crossroads.

He was a novelist for which his known work included The Domino Principle which was adapted into a 1977 film, directed and produced by Stanley Kramer.

[8] According to The San Francisco Examiner, Kennedy said he turned to writing because he no longer had the ego required to pursue an acting career.