Sheikh Khamis Said Mohamed Mataka has more than 15 years working experience in the Islamic Finance profession, he has served several religious bodies as Chairman and Secretary General including National Executive Organ of the National Muslim Council of Tanzania (BAKWATA), Board of Trustee Masjid Nur & Islamic Centre, Educational Board of Tanzania Islamic Centre, Foundation of Sheikhs and Islamic Scholars in Tanzania and the Mohamed IV Foundation for African Ulamaa (Scholars). He is currently a co-chair of interfaith Standing Committee on Economic Justice and Integrity of Creation which is formed jointly by the Catholic Tanzania Episcopal Conference (TEC), The National Muslim Council of Tanzania (BAKWATA) and Christian Council of Tanzania (CCT).
Sheikh Mataka joined KCB Sahl Banking Shariah Advisory Board in 2008 as a member of Technical Team and on 2010 as Board member, currently he is a chair of the Board.