Saad al-Kaabi, the president and chief executive officer of Qatar Petroleum, was made a minister of state for energy affairs in the first comprehensive reshuffle since the start of a Gulf diplomatic crisis which has seen Doha isolated by neighbouring former allies.
For the past 17 months, a group of countries including Saudi Arabia, United Arab Emirates and Bahrain have frozen all diplomatic and political ties with Doha, accusing Qatar of seeking better relations with Iran and supporting radical extremism.
Kaabi has been a high-profile figure during the regional political stand-off and recently announced Qatar would boost natural gas production.
The emir announced that the country's foreign minister, Sheikh Mohammed bin Abdulrahman al-Thani, will also become president of the Qatar Investment Authority (QIA), the country's sovereign wealth fund.
The outgoing minister had overseen a programme of reform including the introduction of a minimum wage and the partial abolition of the exit visa system.
However, Qatar faces continued scrutiny over its treatment of a large migrant labour workforce in the run-up to hosting the 2022 World Cup.
In total, there were five ministerial changes, as well as changes to the boards of Qatar Petroleum's and the QIA.
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