At a meeting of the board, there are always three board members who decide a case: a judge, who acts as chair of the meeting, and two members who are nominated by the Bar Council and the Ministry of Immigration and Integration, respectively.
Where a case is to be heard by the Refugee Appeals Board, the applicant has the right to be represented by a lawyer, who is paid for by the state. The Refugee Appeals Board's website contains a list of lawyers who are familiar with immigration law. The applicant has the right to choose a lawyer, but if they do not do so the Refugee Appeals Board will appoint a lawyer on their behalf.
As an asylum seeker, the applicant is usually present during the board meeting of the Refugee Appeals Board together with their appointed lawyer. However, this does not apply to appeals under the manifestly unfounded procedure, the Dublin procedure or in rejection cases where the deliberations of the Refugee Appeals Board would normally be given in writing.
You can visit the Refugee Appeals Board's website here (the site is in English)