Julie Casimiro graduated from Cranston High School West and earned a bachelor's degree in marketing from Providence College. Casimiro spent several years in the private sector before entering politics. She won election to the Rhode Island House of Representatives in 2016 and was subsequently reelected. Casimiro has introduced and sponsored numerous laws aimed at improving education, public safety, and health care, including measures to combat prepaid card scams and protect against cryptocurrency ATM scams. She has also been recognized for her work in child welfare and was selected for a fellowship program focused on youth justice.

Julie Casimiro's legislative initiatives reflect a unique blend of stringent regulatory measures with an emphasis on transparency and protection for vulnerable populations. Casimiro's policy proposals, such as prohibiting the use of personal electronics in schools and requiring price transparency in healthcare facilities, suggest a highly localized approach to governance. Notably, Casimiro's sponsorship of laws addressing cryptocurrency scams and cannabis-related driving education reveals an ideologically agile stance, balancing public safety with emerging economic realities.