Erik Verboon, a senior principal at design firm Walter P Moore and director of its Enclosure Engineering practice based in New York City, died Sept. 21 at age 46. No cause of death was disclosed, but he died "unexpectedly," according to a Go-Fund-Me post by his wife, Michelle Verboon. Trained in both architecture and engineering, Verboon specialized in high-performance, double-skin and other custom unitized systems, as well as geometrically complex composite facades used on new buildings and retrofits. Projects associated with Erik Verboon’s enclosure engineering leadership included, from left, the new Louis Armstrong New Orleans International Airport terminal, Allianz Field in St. Paul and the Chase Center in San Francisco. Walter P. Moore said his “expertise, creativity, and visionary approach” guided teams and clients for more than two decades.