The research reported here adopted a multidimensional approach to studying job insecurity, using Israeli teachers as a case in point. Based on two determinants of job insecurity—unionization and kibbutz affiliation—four distinct employment types were identified: unionized city teachers, unionized kibbutz members, unionized kibbutz hirees, and non‐unionized personal contract teachers. The a priori job insecurity status of the four employment types matched the subjective reports of these teachers, supporting the external validity of the job insecurity scale used. The study explored the effect of job insecurity on work attitudes. Results indicated that job insecurity had an adverse effect on organizational commitment, perceived performance, perceived organizational support, intention to quit and resistance to change, supporting predictions in related literature. The results of this study have implications on the management of job insecurity in changing environments.