Dianne Bunch, DEL, MSN
Vice President, Behavioral Health
Dianne brings more than 20 years of healthcare leadership experience spanning behavioral health, emergency services, operations, and clinical quality improvement. Prior to being named Vice President of Behavioral Health at St. Mary’s Health System, she served as Director of Emergency Services, providing executive oversight for the Medical and Behavioral Emergency Departments, Urgent Care, and EMS.
Throughout her career, Dianne has led large-scale operational redesign and renovation initiatives focused on improving patient safety, care delivery, staff engagement, and operational efficiency. She has extensive experience in evidence-based practice implementation, budget and resource management, workflow optimization, and building high-performing interdisciplinary teams.
Before joining St. Mary’s, Dianne held leadership roles with LifePoint Health, UNC Health, Universal Health Services, National Healthcare Associates, and Womack Army Medical Center. Her background includes leadership of emergency and behavioral health services across hospital, military, and long-term care settings, including oversight of high-acuity crisis response programs and standalone behavioral health hospitals.
Dianne earned her Doctorate of Executive Leadership from the University of Charleston, a Master of Science in Nursing Leadership and Management from Walden University, and a Bachelor of Science in Nursing from the University of Phoenix. She is also a Certified Sexual Assault Nurse Examiner (SANE) and remains active in community and professional leadership initiatives throughout Maine.