Timlok is a registered architect in California. He received a Master of Science in Advanced Architectural Design from Columbia University and a Bachelor of Architecture from the University of Southern California. 

Prior to forming Coline, Timlok practiced as a Retail Architect at Gensler, where he led the design of large-scale retail projects, including Wayfair’s first brick-and-mortar retail store, and developed BYD’s prototype showroom design, now implemented in over 50 locations worldwide. His work has been published in leading architecture and design journals, including Gooood, Architizer, and LandArch.

Sienna Ko is a visual designer with a strong foundation in fashion vendor collaboration and material-driven design.

Her experience working with fashion vendors gave her hands-on exposure to fabrics, finishes, color consistency, and production workflows—skills that naturally extend into architectural material procurement.

With a background in graphic design, she brings clarity, structure, and visual precision to sourcing, documentation, and vendor coordination.