Doctor of law
He was born in 1812 in Messancy (then still part of Luxembourg, now part of Belgium), one of nine children of Jean-Frédérich Tesch (1774-1844) and Marie-Cécile Nothomb (1780-1869). He studied law, graduating from the University of Liège in 1832 with a Doctor of law at the age of 20. He settled in Arlon and registered at the bar there. He was a friend of Émile Tandel, the district commissioner for Arlon-Virton, secretary of the Archeological Institute of Luxembourg and author of "Communes luxembourgeoises". When he was a councillor of the city of Arlon, Tesch collaborated with Georges Wurth to establish an Athénée there.