[1] In 2010, Hallberg won the Prix Benois de la Danse for his portrayal of Count Albrecht in Giselle.

During two years off stage due to complications recovering from surgery on his left foot, Hallberg spent 15 months working with The Australian Ballet's physiotherapy and rehabilitation team,[12] building a relationship with the company that resulted in his being named Resident Guest Artist.

[2] He finally returned to the stage in a role début, that of Franz in Coppélia, with The Australian Ballet and partnered with Amber Scott in December 2016.

Hallberg starred in the 2017 Nike campaign, "I, David", directed by Niclas Gillis with set design by James Casebere.

[14] Hallberg published a memoir, A Body of Work: Dancing to the Edge and Back, with the Touchstone imprint of Simon & Schuster in November 2017.