 That summer, he worked at the Parrish Art Museum in Southampton, New York where he organized an exhibition of Earthworks.As a result, Welch met Robert Smithson and became friendly with Nancy Holt, Jonas Jonas and Richard Serra.From 1971 to 1972, Welch created performance works at 112 Greene Street and had his first significant one-person exhibition at 98 Greene Street, an alternative art space run by Holly Solomon.