In 1871, when a Conservative government headed by Lascăr Catargiu took office, Lahovary was named general director of the Post and Telegraph Service.
He played an important role in setting up this institution, introducing postcards, signing the first international postal and telegraph conventions of the modern Romanian state and representing his country at the first Postal Union Congress in 1874.
In 1895, Finance Minister Menelas Ghermani secured parliamentary passage of a law for the court's reorganization.
In accordance with this law, Lahovary was obliged to retire in 1906, having reached the age of 68.
[1] Lahovary was secretary of the Romanian Geographic Society from 1875 to 1909 and coordinated publication of Marele Dicționar Geografic al României.