[4] In 2014, artist and art critic Dion Kliner highlighted Zack's exploration of the constructed nature of history, stating that his work examines how both events and objects are selectively preserved or erased.
[5] In his 2016 solo exhibition at the Esker Foundation, curated by Naomi Potter, he focused on systems of control, institutional power, and the reconsideration of history and text.
[6] In 2004, his work was included in the East International exhibition in the UK at Norwich School of Art, curated by Neo Rauch and Gerd Harry Lybke.
[12] His work was featured in the 2008 Québec Triennial at the Musée d’art contemporain de Montréal,[13][14][15] which led to a solo survey exhibition at the museum in 2010,[16][2][17] (with catalogue authored by Francois LeTourneux and Seamus Kealy).
[19] That same year, the Surrey Art Gallery in Canada held a survey exhibition of his work, curated by Jordan Strom.