He was appointed as the Chairman of the Shariah Committee on 1 May 2014 and a Non-Independent Non-Executive Director 25 April 2019 at Maybank Islamic.
Dr Aznan received his first degree in Shariah from the University of al-Azhar (BA Hons), Egypt and a Master's degree in Shariah from Cairo University, Egypt with distinction (Mumtaz). He then obtained his PhD from the University of Wales, Lampeter, United Kingdom.
Currently, he is the Deputy Chairman of the Shariah Advisory Council of Securities Commission, the Deputy Chairman of the Shari'a Supervisory Board of Bank Nizwa (Oman), a Board member of Higher Shari'ah Authority of UAE Central Bank, and a Shariah Board member of Accounting and Auditing Organization for Islamic Financial Institutions ("AAOIFI"). He had served as a member of the Shariah Advisory Council of Bank Negara Malaysia (2006-2008 and 2010-2013).
He serves as a member of the Shariah Advisory Board/Shariah Committee for Employee Provident Fund. He also serves as a Shariah consultant/adviser to Maybank Investment Bank, Hong Leong Investment Bank (Stockbroking), Public Investment Bank Bhd (Stockbroking), Malacca Securities Bhd, CGS-CIMB Securities Berhad, UOB Kayhian Securities and Inter-Pacific Securities Bhd. He is a registered Shariah Advisor for the Islamic Unit Trust Schemes and Islamic securities (Sukuk), Securities Commission of Malaysia. Additionally, Dr Aznan serves as the Chairman of the Shariah Committee at Etiqa Family Takaful Berhad & Etiqa General Takaful Berhad, Bank Pembangunan Malaysia Berhad, and Amanah Hartanah Bumiputra
Dr Aznan also serves as a member of the Shariah Advisory Boards of Sedania As-Salam Capital Sdn Bhd, ABSA Islamic Bank (South Africa), FNB Bank (South Africa), Yasaar Limited (London), HSBC Amanah (Dubai), and Standard Chartered (Global), Khalij Islamic (London), Association of Islamic Banking Institutions Malaysia (AIBIM) and International Islamic Financial Market IIFM. Additionally, he acts as an Islamic Estate Planning Advisor, Maybank Islamic Bank Berhad.