The Mine Surface Officials' Association (MSOA) was a trade union representing supervisors in the mining industry in South Africa who did not work underground.
The union was founded in 1919, inspired by the Underground Officials' Association (UOA) which had been established the previous year.
He recruited Koos Bezuidenhout as a new general secretary in 1995, Botha moving to become chief executive.
He began accepting supervisory workers in the metal and engineering industries, and renamed the union as the Administrative and Technical Association of South Africa.
Near the end of the year, it merged with the South African Technical Officials' Association, to form the Administrative, Technical and Electronic Association of South Africa.