Dr. Zoll has studied martial arts for fifty years and is currently  teaching Chen Family style Tai Chi Chuan in the manner of Grandmaster Chen  Zhenglei to people with special needs both over the internet and in person in the Northern California foothills east of Sacramento. As many of the students have challenges in addition to autism and other genetic difficulties the curriculum also includes extensive Qiging routines and Tai Chi tools, including the Tai Chi ruler. He still works as a consulting mathematician and as a software engineer dealing primarily with the multi-national economic impact of epidemics, earthquakes, volcanic eruptions, tsunamis and other disasters.