He participated in several projects and group art exhibits locally and abroad. In May, September, November and December 2020, his cartoons were selected to the 3rd. Cebu Lampoon Festival titled “Coronavirus: The Bad, The Good, and The Ugly” organized by Yoyoy Satiristang Bisaya and Cartoon Movement 2020, and “A Vos Masques! Book (Paris, France), regarding the Coronavirus; book published by Galimard and Cartoon for Peace in partnership with Amnesty International. He contributed his cartoons for Cartooning for Peace for Education (Paris, France); a digital campaign for freedom of expression in the wake of the assassination of Samuel Paty. His selected works were chosen for #Press Freedom Exhibition in honour of the World Press Freedom Conference 2020.

Zach also gets commissioned by international magazines such as Le Monde, Courrier International (France), 5 Media (the Netherlands) and Kehitys Utveckling (Finland).