He entered the government work in 1840, when his father appointed him as the treasurer of Fars, he also arranged a marriage between Fath-Ali and Aziz ol-Dowleh, the daughter of Mohammad Shah. Fath-Ali worked in the treasury for eight years.[1]
In 1848, Naser al-Din Shah bestowed him the title of sahib divan and made him the treasurer of his court. He gradually grew in the court and even became the minister of Mozaffar ad-Din Mirza at some point. His progress however was worrisome for Mirza Aqa Khan Nuri, thus on his behest, on 21 June 1858, a group of outlaws murdered Fath-Ali Khan on his way to the king's palace.[2]