The purpose of this literature review was to examine transition related activities that are associated with securing competitive employment upon graduation from high school for transitioning youth with I/DD. Studies included in this review met the following required criteria: (a) participants were transition-aged individuals with I/DD and (b) studies examined competitive employment outcomes after exiting transition services. Across all 13 studies, we identified a total of seven unique transition-related predictors of post-secondary competitive employment for people with I/DD. These included: (a) paid employment while attending high school, (b) vocational skills instruction, (c) family expectations, (d) high school completion, (e) Individual Educational Plan (IEP) goals relating to competitive employment, (f) self-determination, and (g) participating in postsecondary education. Results of this literature review inform practice and research regarding transition to employment for students with I/DD.