OO & Associates (Formerly Ong, Ordoñez & Associates) was formed amongst three (3) certified public accountants in July 1996. All of the partners have extensive work experiences in private and public practice prior to forming the partnership. Due to the increasing number of clients, and to satisfactorily serve them, an equally qualified CPA was admitted to the partnership in June 2005.

Employing the competence of around 100 personnel, the firm offers a wide range of services including but not limited to audit and assurance, business support, management advisory services, tax planning and consultations, processing of documentary requirements with various government agencies and others.