Adjective
nontenured (not comparable)
Not possessing tenure.
Nontenured teachers can be eliminated at whim, but as soon as they get tenure they are bulletproof: you'll never get rid of one.
Elsewhere in the academic world both tenured and nontenured professors with alleged or admitted communist party ties were fired with relatively little fuss or protest. Source: Internet
Peirce's nontenured position at Hopkins was the only academic appointment he ever held. Source: Internet