Brent Wallarab Since 1991, Brent Wallarab has served as Specialist in Jazz for the Smithsonian Institution in Washington, DC. During this time he has transcribed, edited, and restored nearly 300 works for big band deemed by the Smithsonian as national treasures. Wallarab also performs as lead and solo trombonist for the Smithsonian Jazz Masterworks Orchestra, the jazz ensemble-in-residence of the National Museum of American History, a position he has held since the inception of the orchestra in 1991.