Should I be using "require" or "requires" in the sentence below? [closed]

Question

An established South African survey business specialising in engineering and topographical surveys for infrastructure development & construction projects across Africa requires a Survey Manager to join their team based in Pretoria.

Answer 1

The sentence you have written is correct. requires would fit it perfectly because in the sentence, you are talking about An established South African survey business which is clearly singular.

Hope I hepled