He is QGC's legal representative starting from Monday, the firm said in its resolution.
The firm will hold a shareholder meeting next Tuesday in HCMC to seek approval for the dismissal of Loan, the previous CEO, and the appointment of Cuong as a board member for the 2022-2027 term.
Loan, 64, was arrested last Friday on accusations of legal violations related to a property project in HCMC.
As of the end of last year, Loan owned 102 million shares of Quoc Cuong Gia Lai, equivalent to a 37% stake, while her daughter held 39.4 million shares and Cuong 537,000 shares.
Cuong has a bachelor's degree in Business Management and previously served as a board member and deputy CEO of Quoc Cuong Gia Lai until the end of 2018.
He later founded a property developer called C-Holdings, which specializes in real estate projects in Binh Duong Province that borders HCMC.