About the Company. OMA. is an international architecture and urbanism practice founded in 1975. With offices in Rotterdam, New York, Hong Kong, and Australia, the practice is led by seven partners: Rem Koolhaas, Reinier de Graaf, Iyad Alsaka, Shohei Shigematsu (NY), Jason Long (NY), David Gianotten, and Chris van Duijn. Over the past five decades, OMA has produced a broad portfolio of projects, employing a team of more than 200 architects, design...