He was introduced to the cello at the age of one-and-a-half by his father, who continued to be his primary teacher throughout his youth.
Kosower went on to study with János Starker at Indiana University and Joel Krosnick at the Juilliard School.
[citation needed] He has also given solo performances in sat the Théâtre du Châtelet in Paris, Frankfurt’s Alte Oper, Berlin’s Komische Oper, the Hong Kong Cultural Centre, the Theatro Municipal in Rio de Janeiro, and in New York’s Avery Fisher Hall.
[6] Along with his father and sister, Kosower has toured the United States and Europe as a member of the Dolce Cello Trio.
Kosower has been a top prize winner in both the Rostropovich and Pablo Casals International Cello competitions, including a special prize in both competitions for best interpretation of the newly commissioned works by Marco Stroppa and Cristóbal Halffter.