Fully understanding our clients’ goals is vital in successfully fostering client relationships.

Tan Warren
Associate Vice President; Business Development

Tan is an associate vice president at CallisonRTKL in Los Angeles. As a business development specialist for the healthcare sector, Tan initiates, develops, and maintains current client relationships and actively promotes CallisonRTKL’s wide range of healthcare services on the West Coast to expand the firm’s presence. Tan brings over ten years of industry experience to the healthcare sector.


Health Facility Planning
Health Facility Transitioning
Healthcare Technologies and Medical Equipment Planning
North America