A person’s ~ in an organization is the importance and power that they have compared with others, or the fact that they have worked there for a long time.
He has said he will fire editorial employees without regard to ~.
N-UNCOUNT
SENIORITY
Meaning of SENIORITY in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012