He had his professional training with Coopers & Lybrand, now Pricewaterhouse Coopers(PWC). Mr Quao started his career as a member of audit teams engaged in small- and medium- sized audits. He was employed by Crocodile Matchets (Ghana) Limited as an Accountant. By dint of hard work he was promoted to the position of Company Secretary/Accountant. The position gave him the opportunity to attend several management training courses held at the Head Office of the parent Company, Ralph Martindale Company Limited in the United Kingdom. He was eventually made the General Manager, a position he held until he decided to go on early retirement.