Robert Derector Associates is a full service engineering firm with a local feel and a global reach. Founded in October 1980, RDA's practice focuses on the design and commissioning of corporate offices and mission critical facilities, as well as on the modernization of existing building infrastructures. As New York's largest tenant advocate, RDA is structured, from the ground up, to make sure our clients achieve 100% of their project goals in the most efficient and effective manner possible.