Mr. Bui Van Ngoc was a member of VACO since September 1991. Through the positions of Auditor, Deputy Head, Head of Audit Department, Audit Director, Chairman of the Members' Council and General Director. From December 2022 up to now, Mr. Ngoc is the Chairman of the Members' Council and is the first legal representative of VACO.

Mr. Ngoc has made many contributions to the development of the independent audit industry in Vietnam. He is one of the few members participating in the Research Committee to successfully draft Vietnamese audit standards No. 1000, especially he is the architect and builder of the Audit of finalization statement of finished investment capital and widely applied in providing construction investment project audit services in Vietnam's independent audit industry.

Mr. Bui Van Ngoc obtained a bachelor's degree in 1991 from the University of Finance and Accounting (now the Academy of Finance) specializing in construction auditing, Certified Practising Accountant (CPA) in 1999, with professional qualifications. Highly qualified and has extensive practical experience in the fields of auditing, financial consulting and accounting. In particular, he has been very successful in the fields of management, supervision, and guidance and training of staff implementing many large audit contracts, key national projects and clients who are economic corporations, Corporations, Joint Stock Companies, international projects such as Vietnam Oil and Gas Group, Vietnam Electricity Group, Vietnam Coal and Mineral Industry Group, Vietnam Cement Industry Corporation Nam, Vietnam Shipbuilding Industry Corporation... He is one of the first members of the Vietnam Association of Practicing Auditors and received many certificates of merit from the Ministry of Finance, and the title of emulation soldier in the finance industry. Certificate of Merit from the Minister of Finance for outstanding achievements in building and developing the independent audit services market in the period 2006 - 2010.

He is the leader and manager of all business activities of VACO.