[3] At Princeton, he studied composition and music theory with Milton Babbitt, Edward Cone, Claudio Spies, and Paul Lansky.

Despite Earle's broad success with elevating the quality level of the Odesa Philharmonic Orchestra, he has publicly criticized the local government for its lack of support.

In an interview with Vladislav Davidzon, editor of The Odessa Review, he explained that the orchestra was forced to be self-sufficient in the face of a lack of support: "We even did dental work for wind players so that they could continue to play fifteen years ago.

It turned out to be a very important issue, I had one horn player who had a number of teeth pulled by an idiot dentist and so he could not put his dentures in and was completely unable to play.

He also conducted world premiere recordings of compositions by Henry Gilbert, George Whitefield Chadwick,[8] Theodor Berger, Miguel del Aguila, and Igor Raykhelson.

"[10] In 2003, in conjunction with leading newspapers in Ukraine, the Russian Cosmonaut Association named a star in the Perseus (constellation) as "Hobart Earle".