What is an "L.Mgt" qualification?
My own work is on the STEM / hard science side of Academia, so I don't have first-hand knowledge about this qualification, but I would read it as a Licenciate degree in Management.

A cursory search turns up a few institutions that offer such a degree:


University of
Tampere
Lund University
Universidad de Navarra
Pontifical University of Comillas
Universidade Lusófona