During the 1950s, the Plan’s Ministry engaged in a major thinking, aiming to restore a dynamic industrial economy, which went through constructing new factories, training and innovation. Postgraduate and technical teaching became a priority. France sorely lacked technicians and engineers. 

In the same extension, the Plan’s advisers designed two new ways of training engineers. One, by-product of the universities (who’ll later become INSA), and the other, closer to the model of “Arts et Métiers”, yet more applied: they will become the ENIs. Metz’,Brest’s, and Saint-Étienne’s ENIs opened in 1961, followed by Belfort in 1962 and Tarbes in 1963. 

ENIM’s first promotion graduated in 1966: 29 engineers will enter the professional world, not immediately though, because military duty awaits them. In six years, the National Engineering School of Metz reaches its first cruise level: 110 engineers per year. The students are technical graduates, then “E”, so essentially men. The first “Enimienne” entered the school in 1969. It’s the year of the creation of Metz’s University, officialised in 1970. ENIM was celebrating its 8th birthday and delivered its fourth promotion. The ENIM of the 70’s, it’s also the creation of continuous training in order to ease the social promotion of company’s executives and technicians. A special decree will be necessary to permit this opening. 

Ever since, more than 7000 ENIM engineers, and more than 20000 ENI engineers irrigate Lorraine’s industrial sphere, in France but also abroad.

Since 2010, the School is located on the technopole of Metz. It also has at its disposal Chesny’s Fort, in the city of Chesny, that is a constituent of ENIM, which aims for the developing of training actions and research in the field of non-destructive examination. 

Within the framework of a national evolutive environment, ENIM has initiated a rupture of its organization as of 2013. In this regard, initial elements have been recorded within the framework of the 2013-2017 Site Contract signed on June 4, 2013 between ENIM, the University of Lorraine and the Ministry of National Education and Higher Education and Research. In this extension, the University of Lorraine and ENIM signed an Association Agreement dated January 30, 2014.

On September 13, 2015, the decree on the integration of ENIM into the University of Lorraine in the form of an internal school created within the Lorraine INP collegium bringing together 10 other engineering schools was published. ENIM integrated this collegium on January 1, 2016, to become the 11th engineering school of the University of Lorraine, thus passing from a status of “EPA” to a status of L713-9 school of the education code.