Kantor is currently the Sally Shepherd Perkins Professor of violin at the Shepherd School of Music at Rice University, having previously served as the Eleanor H. Biggs Memorial Distinguished Professor of Violin at the Cleveland Institute of Music.

He was appointed as artist-in-residence of The Glenn Gould School/ Royal Conservatory of Music and has been on its faculty since 2008.

[4] In addition, he has presented master classes at institutions including Indiana University, Eastman School of Music, and the New World Symphony Orchestra, among others.

He has performed as a soloist with numerous symphony orchestras and has performed with the New York String Quartet, the Berkshire Chamber Players, the Lenox Quartet, and the National Musical Arts Chamber Ensemble.

He was appointed as guest concertmaster of the New Japan Philharmonic and the Toledo Symphony Orchestra.