This study examined the validity and reliability of the Navy vocational interest inventory, Jobs Opportunities in the Navy (JOIN). A positive relationship between interest and satisfaction was hypothesized. The reliability of JOIN was examined as a whole, and further compared among gender and racial subgroups to ensure that the outcomes of JOIN were free from differential reliability among the subgroups. Data from a usability survey were analyzed to examine face validity of the instrument. Results showed that JOIN was positively correlated with training satisfaction. Furthermore, the instrument produced highly reliable results as a whole and among subgroups. Lastly, statistical analyses suggested that JOIN was face valid and held the attention of participants well. Future data collection and analyses were recommended to further support the outcomes of this study.