DevOps was originally supposed to be about moving dev and ops out of their respective silos and into one combined team so as to break down communication barrier

DevOps was originally supposed to be about moving dev and ops out of their respective silos and into one combined team so as to break down communication barriers and help each side understand their duties better. Under this model there is no such thing as a "DevOps engineer" as "DevOps" is a team structure not a job title. Now days "DevOps" often just means "cloud deployment engineer" or "we can get a developer to look after the servers". What you seem interested in is the ops side of things. Usually this will be under a title like sysadmin, deployment engineer, "DevOps".