What school were Hryhoriy Veryovka and the composer of "Carol of the Bells" faculty members at? 
Hryhoriy Veryovka:  Veryovka was also a professor of conducting at the Kyiv Conservatory, where he worked alongside faculty including Boleslav Yavorsky, Oleksandr Koshyts, Mykola Leontovych, and Mykhailo Verykivsky. Mykola Leontovych:  He is recognized for composing "Shchedryk" in 1904 (which premiered in 1916), known to the English-speaking world as "Carol of the Bells" or "Ring, Christmas Bells".
Kyiv Conservatory