Building upon his concert experiences of the 1930s, Serry entered the golden age of radio performing on the CBS radio network and assisted several concert artists in New York City including: Marianne Oswald (aka Marianne Lorraine) in the poem "Mr. Lincoln and His Gloves" (by Carl Sandburg) and in "Never Before" (by Archibald MacLeish) at Town Hall (1942). This performance was praised in "The Players Magazine - National Journal of Educational Dramatics". "The New York Times" described it as being skillfully presented. He also appeared at Town Hall under the baton of Alexander Smallens in a concert performance of Virgil Thomson's opera "Four Saints in Three Acts" with the choral director Leonard De Paur in 1941. For ten years Serry performed as an original member of Alfredo Antonini's CBS Pan American Orchestra (1940–1949) on the "Viva América" program for the Department of State's Office of Inter-American Affairs (OCIAA) in support of its cultural diplomacy initiatives. He also worked with Antonini, Nestor Mesta Chayres and members of the New York Philharmonic in the "Night of the Americas Concert" gala at Carnegie Hall in 1946.