Before his retirement he served as Director of the Institute for Housing and Urban Development Studies (IHS) in Rotterdam for a period of 19 years. AIM has conducted courses in heritage preservation, urban management, inner city revitalization, local economic development and the consequences of climate change for urban centers all across Southeast Asia. Cor is an honorary member of the Watanyu na Talang Foundation in Thailand and a member of the International Advisory Group of the Yangon Heritage Trust.