Marissa Tierney, MSN, CNS, is a board-certified Clinical Nurse Specialist specializing in pediatric critical care with a passion for advancing healthcare quality and research. Her career spans pediatric and cardiovascular ICUs, perioperative services, and academic nursing, where she has been a champion for quality improvement and patient-centered care. Currently serving as the Quality and Research RN for Resuscitation at a tertiary academic center, Marissa drives evidence-based initiatives to enhance patient outcomes in critical care settings.