From 1987 to 1989, Nena was the Program Director at the New York Open Center and, from 1991 to 2002, was the Managing Director of Tibet House U.S. located in New York City. The Tibet House had been founded in 1986 by the Thurmans, Philip Glass, and Richard Gere, at the behest of the Dalai Lama. Nena oversaw the construction of Tibet House, the educational programming, and, with Philip Glass, initiated the annual benefit concert at Carnegie Hall, as well as the annual benefit auction at Christie's.