Complex sentence: He is now the Executive Director of the Singapore Compact for Corporate Social Responsibility (CSR), which serves as the national CSR society in Singapore, which is the country network and focal point of the United Nations Global Compact.
Split into simpler sentences: He is now the Executive Director of the Singapore Compact for CSR (Corporate Social Responsibility), which serves as the national CSR society in Singapore. It is also a country network and focal point of the United Nations (UN) Global Compact.