Complex sentence: He had also been Administrator, Aiwan-e-Iqbal from 2002 to 2010, when Nadeem Iqbal Abbasi then Joint Secretary, Government of Pakistan, Ministry of Culture, took over as Administrator from him.
Split into simpler sentences: He had also assumed the charge of Administrator, Aiwan-e-Iqbal from 2002 to 2010. Mr. Nadeem Iqbal Abbasi then Joint Secretary, Government of Pakistan, Ministry of Culture, taken over the charge of Administrator from him.