The Senate on Monday approved the appointment of Nopadhol Pereeroek as secretary-general of the Council of State (CoS), filling a post left vacant after Pakorn Nilprapunt stepped down in March before joining the Bhumjaithai-led government as a deputy prime minister.
The vote came after senators reviewed a report on Mr Nopadhol's background and conduct. Under Senate regulations, the discussion was held behind closed doors, drawing objections from Sen Nantana Nantavaropas.
Ms Nantana said the public should be able to scrutinise the qualifications of people appointed to key state positions.