Hansen established himselves on the Oslo jazz scene first in Tore Sandnæs Big Band (1958), Mikkel Flagstad Quintet (1959), Bjørn Jacobsen Septet (1958–60), Arild Wikstrøm Quartet (1961) and within Kjell Karlsen's various ensembles including at Moldejazz (1962), Bjørn Johansen Quartet (1962).
Jacob | John Jacob Astor | Grand Ole Opry | Jacob M. Appel | Jacob Epstein | Jacob Zuma | Jacob Obrecht | Gus Hansen | Jacob Lawrence | Jacob Appel | John Jacob Astor IV | Irène Jacob | Jacob Jordaens | Al Hansen | Stan Hansen | Paul Jacob | Ole Rømer | Ole Bull | Sven-Ole Thorsen | Ole von Beust | Ole Einar Bjørndalen | Meshullam ben Jacob | Jacob Riis | Jacob Grimm | Jacob Christian Schäffer | Jacob Appelbaum | Gunnar Hansen | Ron Hansen | OLE DB | Ole Christian Kvarme |
Other cooperation was with Knut Værnes, Staffan William-Olsson's records Smile (1998) and Oak road boogaloo (2000), Alf Kjellman Project, Beady Belle and Trionic, Ole Jacob Hansen, Espen Lind's band, Espen Rud Sextett, awarded Spellemannprisen 1998 for the album Rudlende, Tine Asmundsen's «Lonely Woman», and Geir Lysne's «Listening Ensemble».