Appointment to Civil Service

All told, we reiterate the long-standing rule that the mere fact that a particular position belongs to the career service does not automatically confer security of tenure on its occupant. Such right will have to depend on the nature of his appointment, which in turn depends on his eligibility or lack of it. A person who does not have the requisite qualifications for the position cannot be appointed to it in the first place or, only as an exception to the rule, may be appointed to it in an acting capacity in the absence of appropriate eligibles. (Amores v. Civil Service Commission, G.R. No. 170093, April 29, 2009)