For Collectible Design Fair's New York debut, Tamaddon was brought on as a consultant to help shape the fair's arrival in the United States guiding exhibitor growth, curatorial direction, and public programming with a sharp eye toward both cultural relevance and market impact. Bridging Collectible's European roots with a North American audience, she expanded participation across the U.S., Mexico, and Canada, positioning the inaugural edition as an international meeting point for contemporary design. She also curated the fair's celebrated first New York Curated Section, bringing together 28 exhibitors from 12 countries, the broadest global representation the section had seen to date.

For the exhibition design, Tamaddon invited artist and designer Rafael Prieto to translate these layered references into an immersive environment composed of printed wallpaper featuring film photography from his hometown of Manhattan and travels abroad, conceived specifically for the presentation in collaboration with New York-based Wallpaper Projects. Inspired by Frank O'Hara's Having a Coke with You, the section captured the layered energy of New York while honoring the fair's Brussels origins. Tamaddon currently sits on the fair's advisory board.