Mack's work for two pianos, American Groove, was performed by the Westhuizen Duo across the United States and South Africa throughout 2011. The work was a Selection Winner for the SCI Regional Conference in 2010 and premiered in Greensboro, North Carolina. A choral work, Of Fire and Form, commissioned by the West Virginia chapter of the ACDA premiered in February 2011 at the Clay Center in Charleston, West Virginia and was performed on tour by the Marshall University Chamber Choir.
