We already know we have a Job Catagory title of our job, say Operation Engineer.
On the other hand, based on what we are doing on the job, we have a Function Title, say DBA, Unix SA, Network Admin, stc.
On our resume, we usualy looking for the position listed as the function title, and we put our function title on the resume.
正如虎笑長所說, 其實不必太在意 Title, focus on what skill set will be used on the job duty.
祝你找工順利!