He worked as a post-doc on the CLEO experiment at Cornell university in the US, then he became a research scientist at Columbia University in New York and associate scientist on the ATLAS experiment at Large Hadron Collider (LHC) at CERN. from 2006 to 2012, he was a Professor of Physics at the University of Regina in Canada. During this time, Benslama founded and led [1][2][3][4][5][6][7] an international research group in experimental high energy physics. He worked on the ATLAS experiment at CERN where he was a principal investigator and a team leader.