She toured the globe throughout her career, recorded the works of various composers, and taught master classes in chamber music and violin all round the world.

[7] Hertz studied with NBC Symphony Orchestra concertmaster Mischa Mischakoff and later under Arturo Toscanini for a period of three years.

In 1967, Hertz recorded Concerto in F by Joseph Haydn with harpsichordist Kenneth Gilbert and some of William Boyce's and Chevalier de Saint-Georges' works with violinist Morry Kernerman in 1973.

The preceding year, she joined David Oistrakh in playing double concertos by Johann Sebastian Bach and Antonio Vivaldi at the Salle Claude-Champagne.

[1] In September 2000, Hertz announced her retirement from the post of concertmaster of the McGill Chamber Orchestra and accepted an emeritus title.

[15][16] Barbara Smith, the National Youth Orchestra's executive director, described Hertz "not only a phenomenal violinist, she was an incredible educator and mentor to many" and adding "The impact she had on her students was profound and reached beyond just technical and musical influences.

"[8] A flutist said of Hertz, "To see a strong, confident woman like Yaela fill the traditionally male position of concertmaster was something extraordinary.