A frequent collaborator with Frieze, Tamaddon co-curated Frieze Los Angeles's Focus section dedicated to emerging practices and galleries, expanding the Focus section's scale twofold (from 9 to 19 galleries) alongside The Walker Art Center's Amanda Hunt. Tamaddon chairs the Frieze Connect committee and conceives multidisciplinary programming globally in dialogue with her curation across Frieze's geographies spanning London, NY and Los Angeles. For this most recent edition of Frieze London, she conceived and cohosted a panel with architect Jayden Ali, Kit Kemp Design Director Minnie Kemp and artist Anousha Payne. She is conceiving programming with Frieze Connect scheduled for Los Angeles and NY to unfold 2026 and 2027.