After graduating from Rutgers School of Law, Kiersten practiced criminal law as an Assistant Public Defender in Tampa Bay, Florida for several years. She represented hundreds of defendants and juvenile offenders who were facing misdemeanor and felony charges. She also spent a year practicing real estate law at a large private law firm. Kiersten left the active practice of law after earning a Masters Degree in Public Administration to manage a social justice program at the University of South Florida. She remains a member of the Florida Bar Association.