Complex sentence: She was the first director of UNDP's Human Development Report Office, a position which she held from 1989 to 1994, where with Mahbub ul Haq she co-led the team working on the Human Development Report.
Split into simpler sentences: She was the first director of UNDP's Human Development Report Office, a position which she held from 1989 to 1994. With Mahbub ul Haq, from 1990 to 1994, she led the team working on the Human Development Report.