[8] In December 2007, Hauser played the Kol Nidre with the Metropolitan Sinfonia at a Gala Tribute Concert dedicated to Mstislav Rostropovich.

The album, Christopher Ball: Music for Cello, was recorded at the first live performance of the concerto in 2010, and features former Greenwich Trio member, Yoko Misumi, on piano.

[10] In January 2011, Hauser, along with friend and fellow cellist Luka Šulić, performed a cover of Michael Jackson's "Smooth Criminal" which was played solely on cello.

[14] During the COVID-19 quarantine, unable to tour in support of his solo album, Hauser released three performances via live streaming.

The third, again titled Hauser: Alone Together, was recorded at Fort Lovrijenac in Dubrovnik, Croatia, recognisable to many fans from the HBO series, Game of Thrones.

[15] Hauser has worked with cellists such as Mstislav Rostropovich, Bernard Greenhouse, Heinrich Schiff, Frans Helmerson, Arto Noras, Il Volo, Ralph Kirshbaum, Valter Despalj, Philippe Muller, Thomas Demenga, Young-Chang Cho, Reinhard Latzko, Karine Georgian, Roel Dieltiens, and Alexander Ivashkin.

In November 2011, he released another classical album: Brahms, Beethoven & Bruch for Clarinet, Cello & Piano, again with Ms. Misumi, and clarinettist Leslie Craven.

Together with the Slovenian violinist Lana Trotovsek and Japanese pianist Yoko Misumi, Hauser was a member of the Greenwich Trio,[until when?]

[16] The Trio won a series of first prizes at international chamber music competitions in the UK, Belgium and Italy.

In March 2008, they performed Beethoven's Triple Concerto with conductor Barry Wordsworth and in September the same year they played in the sold out opening festival at King's Place, London.

[17] In January 2012, they appeared as the special musical guests on Fox's hit TV series Glee where they performed "Smooth Criminal" in the Michael Jackson tribute episode.

[20] Hauser subsequently won an additional Porin award, for Best Video Release, along with Luka Šulić (2CELLOS) and Dušan Kranjc (drummer) for their Arena Zagreb DVD.