He studied at the Athénée de Luxembourg and the lycée in Metz, France, before reading law at the newly established University of Liège, graduating in 1822.

In the National Congress called in Brussels, Metz was one of sixteen deputies representing the arrondissement of Luxembourg (claimed in its entirety by Belgium).

[2] In 1836, Metz moved to Arlon, where he established a newspaper, L'Echo de Luxembourg, to promote Luxembourgish and liberal interests, along with Emmanuel Servais and Victor Tesch.

[2] He urged the Belgians to enter negotiations with the Netherlands, but spoke against the Third Partition of Luxembourg, ultimately voting against the Treaty of London.

[9][10] In Edmond de la Fontaine's 1848 satirical poem D’Vulleparlament am Grengewald, Metz was depicted as a crow, the president of the parliament of birds.