Deanna Deveney swiftly passed the bar after graduating from law school, allowing her to practice law in the state of Massachusetts. She would return to the Middlesex District Attorney's office, where she had interned, but as an Assistant District Attorney this time. Deanna served as an ADA in the Community Partnerships division of the office, where she focused on prevention rather than prosecution, under the direction of District Attorney Marian Ryan. She developed and worked on projects to educate people about domestic violence, elder abuse, and the opioid crisis. studied local crime rate information to establish each community's specific needs Deanna was most notable for her role in resolving the Massachusetts State Drug Lab scandal, which began in 2012.