Koh's work has appeared on the covers and pages of numerous editorials including Vogue, Harper’s Bazaar, Marie Claire, Elle, Instyle, Love Want, SideNote. Hair & beauty commissions include Giorgio Armani, L'Oreal, Endota, CHANEL, Dior, Mecca. Campaigns include Cotton On, Venroy, Seafolly, Bonds, The Upside, Bra's N Things, Michael Lo Sordo, Jac & Jack, Lee Mathews, Toni Maticevski, Aje, Mimco, Seed, Country Road, David Jones. Koh is frequently requested by visiting celebrities working as a hair stylist for Nicole Scherzinger, Alesha Dixon, Teresa Palmer, Lara Worthington, Rose Byrne and has lead hair stylist for Jessica Mauboy.