The committee, chaired by Supreme Court president Wirat Limwichai, would begin by shortlisting 15 names from the academic sector before moving on to candidates from other four sectors private, professional, civic society and state.
Each sector is slated to be allocated 15 senatorial seats, except the state sector which will have 14 seats.
The academic sector has 98 candidates put forward by 123 organisations. All five sectors have submitted 1,087 candidates.
The upper chamber will comprise 74 appointed and 76 elected senators. The senatorial race is scheduled for March 2.