In 2017, there's literally _no_ difference between the outcomes expected from a "Systems Engineer" and a "DevOps Engineer" - both are expected to produce HA, Automated, Well Documented Infrastructure, to allow developers to run their code. Anyone not doing that is just a _bad_ "Systems Engineer"
Developers don't call themselves "Agile Developers" because they started using agile methodologies or "CI Developers" with the boom of CI, but for some reason Ops guys want to call themselves "DevOps Engineers" because they read The Phoenix Project.
People talk about automation as if automation = DevOps, but I believe automation is a side-effect of the shared empathy which DevOps fosters. Because you have that empathy with your devs, you realize that their main goal is to be able to get their code in front of users _as fast as possible_. Automation is the answer to that.