He led his own Be Bop Band (1949–50), and joined the orchestras of Tage Wilford and Hans Backe (1945).
Mikkel Kessler | Kirsten Flagstad | Mikkel Frandsen | Mikkel Flagstad | Mikkel Borch-Jacobsen | Mikkel Bødker | Mikkel Beckmann | Mikkel Beck |
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).