Greenberg took part in the «All-Star Trumpets session» (Paris Jazz Festival, 1949) with Miles Davis, Bill Coleman, Jimmy McPartland and Aime Barelli.
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he was a central part of Oslo's swing-jazz milieu, where he led his own Rowland Greenberg Swing Band (1939–41) with Arvid Gram Paulsen on sax, Lulle Kristoffersen on piano and Pete Brown on drums.
An instrumental version was recorded in Oslo on April 29, 1954 by "Verden Rundt's" All Star Band (Rowland Greenberg (trp) - A. Skjold (trombone) - K. Stokke (alt) - K. Bergheim (tenor) - Knut Hyrum (baritone) - I. Børsum (bass) - Scott Lunde (piano) - K. O. Hoff (drums)).
Kelly Rowland | Rowland Hill | Hank Greenberg | Richard Greenberg | Rowland Hill (postal reformer) | Clement Greenberg | Rowland Hill, 1st Viscount Hill | Joseph Greenberg | Greenberg Traurig | John G. Rowland | Tiny Rowland | Rowland Heights, California | Rowland Heights | Rowland Evans | Rowland Bowen | Ron Greenberg | Oscar W. Greenberg | Greenberg | Rowland Allanson-Winn, 5th Baron Headley | Ross Rowland | Peter Greenberg | Noah Greenberg | J. Roy Rowland | John Rowland | Jerry L. Greenberg | Jeff Greenberg | Bryan Greenberg | Alan C. Greenberg | William Rowland | Seth Greenberg |
Gram Paulsen joined the orchestra at Oslo Swingklubb, and a new quartet with Lulle Kristoffersen and Pete Brown, under the leadership of Rowland Greenberg (1940).