Central Park's design was finalized by a gamut of professionals. Frederick Law Olmsted and Calvert Vaux were the primary designers, assisted by board member Andrew Haswell Green, architect Jacob Wrey Mould, master gardener Ignaz Anton Pilat, and engineer George E. Waring, Jr..[91][92] Olmsted was responsible for the overall plan, while Vaux designed some of the finer details. Mould, who worked frequently with Vaux, designed the Central Park Esplanade and the Tavern on the Green building.[93] Pilat was the park's chief landscape architect, whose primary responsibility was the importation and placement of plants within the park.[93][94] A "corps" of construction engineers and foremen, managed by superintending engineer William H. Grant, were tasked with the measuring and constructing architectural features such as paths, roads, and buildings.[95][96] Waring was one of the engineers working under Grant's leadership and was in charge of land drainage.[97][98]