Began his career directing community theater and summer stock.
According to his official website "Ralph's Cinema Trek," one project Senensky directed, The Train (1967), was submitted for Emmy consideration in 1967 and won the award for Outstanding Dramatic Series that year. In addition, Senensky directed two performers to Emmy wins in 1977: Gary Frank for Family (1976) and Beulah Bondi for The Pony Cart (1976).
Was a typist in CBS Radio's mimeograph department in the early 1950s.
With the death of Robert Butler on November 3, 2023, he is the last surviving person to have directed an episode of Star Trek (1966).