Established in the 1970s, Ong & Wong Group with a branch office in Kota Kinabalu (East Malaysia) provides various professional services.

Ong & Wong Chartered Accountants acts as auditors of the historical financial statements for its clients, while its taxation consultancy services are provided through O & W Tax Consultants SB. Its corporate restructuring and insolvency consultancy services division is placed under O & M Corporate Advisory SB while its affiliate O & M Management Consultants SB carries out company secretarial functions.