Trondheim Jazz Orchestra (TJO) (established 1999 in Trondheim, Norway) is an orchestral project based in Trondheim, and closely related to both the Midtnorsk Jazzsenter (MNJ - Mid Norwegian Jazz Center) and Jazz Line at the Trøndelag Conservatory of Music (NTNU).
During the 1990s the orchestra was a plain conservatory-band (Konsen Big Band). In 2000 the name of the band was changed to TJO. An important feature with Trondheim Jazz Orchestra is the band's flexible and varying size crew. The orchestra works on a project basis and performs mainly commissioned works of selected composers.
TJO has collaborated with Norwegian composers such as Erlend Skomsvoll, Eirik Hegdal, Vigleik Storaas, Jon Balke, Knut Kristiansen, Geir Lysne, Terje Rypdal and Bendik Hofseth, as well as with international soloists such as Chick Corea, Pat Metheny, New York Voices, Birger Sulsbruck and Joshua Redman.
In 2001 TJO toured Norway extensively with Chick Corea, a cooperation based on the concert at Moldejazz 2000. The collaboration resulted in a CD-release (Live in Molde), which has sold more than 8000 copies in Norway. The collaboration with Chick Corea was resumed in 2006 with a concert at the Hilton Ballroom in New York City during the Annual Jazz Conference (IAJE) in January of that year. This concert was a huge success, and as a result the orchestra was invited to the Tokyo Jazz Festival 2006. The cooperation between TJO and Chick Corea was successful once again and well received by a huge group of spectators while also being televised nationally. John Kelman, All About Jazz, states: "... a far reaching orchestra clearly capable of handling anything and everything that's put in front of it".