seniority

noun
1
the fact of being older or of a higher rank than others
ارشدیت, قدمیت, سابقه
2
the rank that you have in a company because of the length of time you have worked there
ارشدیت, قدمت کاری, سابقه کار
a lawyer with five years’ seniority
Should promotion be based on merit or seniority?