同慶帝
He was professor of French language at the Interpreter School (1866-1868), Chief editor for the Gia Dinh News (1868), Director of the Pedagogic School and at the same time Secretary of the City Council of Cho Lon (1872), professor in French language for the French and Spanish expats at the Collège des Administrateurs Stagiaires in 1874. In February, 1876, Truong was appointed as the Supervisor for king Đồng Khánh at the Viện cơ mật and stayed in that job until October, 1876. Then he went back to Saigon.