Sipho has extensive NGO experience, having worked in youth development and later as the CEO of the KZN Christian Council (KZNCC).

His history with the YMCA dates back to 1991 as a staff member in a local branch and he also served as Chair of the YMCA in a volunteer capacity.

He has served as Chairperson of PACSA Christian and of Church Land Programme, an agency focusing on land restitution and justice issues. He is a Member of the Board on Rob-Smitherham, an NGO working with children in distress.

A psychiatrist by profession, Bonga works at the University of Stellenbosch where he specialises in schizophrenia. He has written and delivered papers on first episode psychosis and is currently studying a group of young schizophrenia patients some of whom are TIK addicts (a particularly strong street drug in the Western Cape area). Bonga is one of the youngest chairs in the SAYMCA history, having recently concurrently held the positions of Chair of the Youth Committee and Chair of the Western Cape region. He has served as a volunteer member of the SAYMCA for more than 10 years, having joined while a student. Bonga is currently studying for a Doctoral degree, having received scholarships to pursue his studies.