Location: Room 210A 2 Medforum Bldg, Heunis St, Secunda, 2302, South Africa. Postal address: 7377, Secunda, 2302. Phone number: 017 634 1033. As far as South Africa is concerned, among other industries including financial firms, media, and banking, mining companies have grown to be among the biggest industries; thanks to mines in Mpumalanga.