As I am a South African citizen , I need to know the procedure I should follow to obtain a works permit for Angola ? Is it best to sort it out with the South Africa embassy in Angola? Or is it beter to apply in South Africa before travelling to Angola?
Once you get a job offer from a company in Angola they will usually assist you in obtaining the correct work permit. Work permits in Angola don't give you any flexibility to move jobs within the country. You will be tied to a single employer and they will need to inform the authorities if there are any changes to your contract.
You will be required to provide your employer with a number of documents. A comprehensive list can be found on the Expat Arrivals Work Permits for Angola page.
If the company is based in Angola it is likely that they will submit your application in Angola. You cannot travel to Angola without having a valid visa - so you will need to wait until you've receive the visa or work permit before you travel.