An SE is a Systems Engineer: a pre-sales. There are two types of SE: The specialist will be in charge of mastering one or more technical solutions, so as to be able to explain in deep dive and / or prove how they work. The generalist (aka core SE), he will be in charge of customers or partners. He must nevertheless have a technical varnish on a set of solutions so as to be able to explain them without going into too much detail. The SE partner will pass on its knowledge to its partners so that the latter can in turn advise their clients. The generalist SE is there to help its clients choose the best solutions that will contribute to meeting the business objectives of their company set by management.