The Office for Metropolitan Architecture (OMA) is an international architectural firm with offices in Rotterdam, New York, Hong Kong, Doha, and Australia. The firm is currently led by eight partners - Rem Koolhaas, Reinier de Graaf, Ellen van Loon, Shohei Shigematsu, Iyad Alsaka, Chris van Duijn, Jason Long, and managing partner and architect David Gianotten.
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