He served as an expert in ophthalmology, cornea, and visual science for Coleman Research Group and Gerson Lehrman Group, which are "expert networks" and as an equities analyst for various Wall Street firms.
In 2001, Chynn was the 1st MD to arrive at Ground Zero on 9/11, where he troaset up the 1st emergency room and triage center at a Burger King across the street from the former World Trade Center [REF].