[2] He entered government service under the Buyid dynasty that ruled Iraq and much of the Middle East at the time, and in 999/1000 was appointed by Baha al-Dawla deputy to the vizier al-Muwaffaq at Shiraz.
[2] After Hasan ibn Ustadh-Hurmuz died in 1011, Fakhr al-Mulk succeeded him as vizier at Baghdad, until he was executed by Sultan al-Dawla on 3 or 6 September 1016.
[1][4] During his tenure in Baghdad, Fakhr al-Mulk distinguished himself as a patron of culture and for restoring peace to the troubled city.
[5] Several of the poets he had patronized composed eulogies in his name, while the mathematician al-Karaji dedicated two of his works to him.
[1] His son, Abu Shuja Muhammad al-Ashraf, was briefly vizier of the Fatimid caliph al-Mustansir Billah in 1064/5.