While working as an apprentice fitter, Bladt discovered the Young Christian Workers, which he joined at the age of 17.
After leaving the organization in 1957, he began working as a fitter in Lorraine coal mines.
In 1972, Bladt joined the Socialist Party (PS) and was elected mayor of Cocheren in 1977.
In 1981, he was elected to represent Moselle's 6th constituency in the National Assembly, but did not seek re-election in 1986.
[1] He represented the Canton of Behren-lès-Forbach [fr] in the General Council of Moselle from 1988 to 2008, when he retired from politics and moved to Cité Belle-Roche.