He was the son of Tulumcu Koca Hüsam Efendi, a qadi of Istanbul.
After completing his madrasa education, he became an assistant (mülâzım) of Shaykh al-Islām Hocazâde Mehmed Efendi.
[1] When Abdurrahman returned to Anatolia, he worked as a teacher in various madrasas, such as Sahn-ı Semân, Ayasofya, and Süleymaniye.
[2][3] After the third dismissal of Ebûsaid Mehmed Efendi from the post of Shaykh al-Islām, Abdurrahman was appointed, in May 1655.
During the Çınar Incident of 1656, Abdurrahman recommended against Sultan Mehmed IV's meeting with the rebels and so was dismissed from his post (or requested his own dismissal) in March 1656.