David Adler was Vice-President, International Relations, of the National Union of South African Students (NUSAS) from 1962 into the late 1970s. As a pioneering educationalist in distance education, he together with Theo Derkx, cooperated closely with WUS during the Apartheid-era, especially on the SACHED projects including the Prison Education Scheme. He was also associated as chairperson or committee member of some 20 Anti-Apartheid NGOs some concerned with training the leadership of the Mass Democratic Movement and with preparing leadership for the future Democratic South Africa. He was “banned" in 1978 together with Clive Nettleton and other SACHED/Mass Democratic Movement comrades. In Post-Apartheid South Africa, he served as the Chairperson of SAQA (South African Qualifications Authority) and was Chairperson of the Audit Committee of the National Development Agency (NDA).