Opportunities for advancement for CNAs are limited. Aides generally need additional formal training or education to enter other health occupations. The most common healthcare occupations for former aides are licensed practical nurse, registered nurse, and medical assistant. For some people, these occupations serve as entry-level jobs. For example, some high school and college students gain experience working in these occupations while attending school. Having experience as nursing assistant can help you decide whether to pursue a career in healthcare or not.