As a Systems Engineer that feels like their title is a bit bloated this was really informative. Currently working on finding a Systems Administrator job and trying to fill my knowledge gaps! Thank you!
Sorry for the delay in response. A lot of systems administration and engineering is overlapping. Personally, I would stay in systems engineering if you can. So many better opportunities in my opinion.
To answer a question requested below, "Does that means system administrator is in a sense of overqualified computer operator?" Absolutely not, a System Administrator (SA) is an individual with experience and documented history of operation across the platforms your organization may be utilizing. Moreover, an SA should be able to confidently troubleshoot and administer a solution should an issue arise. A computer operator is just that, they operate a computer system that is used to help facilitate functions of a business. I hope this clears up some misunderstandings, but understand, depending on where you work your role as an SA may be different.
I see that with Network Engineer job titles that are really glorified Networkadmin roles. I've even seen Desktop Support Engineer too. Lol job titles really lost their real true meaning these days.