un·der·em·ployed 
(ŭn′dər-ĕm-ploid)
(ŭn′dər-ĕm-ploid)adj.
1. Employed only part-time when one needs and desires full-time employment.
2. Employed at a low-paying job that requires less skill or training than one possesses.
n. (used with a pl. verb)
Underemployed persons considered as a group. Used with the.
un′der·em·ployment n.