Saudi Arabia’s King Salman has appointed one of his sons, Prince Abdulaziz bin Salman to replaced the kingdom’s Energy Minister.

Prince Abdulaziz Salman is an older half-brother to Crown Prince Mohammed bin Salman, the kingdom’s de facto ruler.

The appointment is the first time a Saudi prince from the ruling Al Saud family heads the key energy ministry.

Prince Abdulaziz who has a lifetime of experience in energy replaces Khalid al-Falih, who had been removed just days ago as board chairman of the state-owned oil giant Aramco, as the company prepares for a much-touted initial public offering (IPO).

The prince also served as assistant oil minister until 2017 when he was named a minister of state for energy affairs. He holds degrees from King Fahd University of Petroleum and Minerals.