A systems engineer is a person who brings together various subsystems into a cohesive whole. The purpose of this is to enable systems to work together to generate overarching functionality that is useful for the business in question.
IT and telecom companies need systems integration & validation engineers because they frequently rely on multiple systems from a range of vendors. The job of a systems engineer is to work on these systems, bring them together, and then test that they work as intended.
To know more about field engineer