[1] McColl then attended the Oberlin Conservatory of Music (1951–1953) and graduated with honors from the Akademie für Musik und darstellende Kunst in Vienna under Leopold Wlach.
[1] His primary teachers in the United States included Keith Stein, George Waln and Herbert Blayman.
[1][2] After leaving the army he joined Philharmonia Hungarica in Vienna, before moving to New York in 1959 where he worked as a freelance clarinetist and appeared on the Modern Jazz Quartet album Third Stream Music.
[3] He met his wife, Sue, who was then a bassoonist, in Puerto Rico, where his son was born.
[1] As a specialist in early clarinets and basset horns, he did international tours, recordings and concert appearances with the Amadeus Winds, the Philharmonia Baroque Orchestra, and the Boston Handel and Haydn Society, among others.