He has been teaching at Rice University in Houston, Texas USA since 1974 and is the Lynette B. Autry Professor of Double Bass at Rice University's Shepherd School of Music, where he also serves as co-chair of the string department.
Mr. Ellison was a member of the double bass section of the Houston Symphony Orchestra for 23 years (17 as principal), beginning in 1966 under the baton of Sir John Barbirolli and continuing during the years when the orchestra hosted such notables as Aaron Copland, Leonard Bernstein, Henry Mancini, and Jascha Heifetz.
Ellison was the first principal double bassist of the Houston Grand Opera orchestra (with whom he continues to perform), performing in the company's premiers of Nixon In China by John Adams and Akhnaten by Philip Glass.
Mr. Ellison has served as principal double bass of the Grand Teton Music Festival in Jackson Hole, Wyoming, principal double bass of the Santa Fe Opera, performer/faculty at the Aspen Music Festival and Sarasota Music Festival, and was instrumental in the development of the double bass program, as well as teaching for some 40 summers, at the Academie Domaine Forget in Québec, Canada.
His many former students hold performing and teaching positions across the US, Canada, Europe, Australia, New Zealand, and Asia.