We are/the company is looking for a candidate with prior management experience
この文脈でこのように翻訳できると思います、「マネジメント経験」=「management experience」、「がある方」=「A person with」、「を募集しています」=「is recruiting」、ということでこのように表現できます:「We are/The company is recruiting a person with management experience」または「We are/the company is looking for a candidate with prior management experience」ーこの方が最も適切な言い方だと思います
We are now looking for a person who has an experience in management
We are now looking for a person who has experience in management.
be looking for~で〜を探している
経験がある方は"a person who has an experience in~ やexperienced person in~が適切かと思われます