Senior Leadership

Senior Leadership Team

Our experienced and dedicated leadership team is guided by our Mission to provide care for the whole person, in service to all in our communities as well as by our core values of compassion, integrity, collaboration and excellence.

President, St. Mary’s Health System and SVP, Covenant Health

T: 207-777-8802

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Cindy Segar-Miller, FACHE, joined St. Mary’s Health System as the President effective September 1, 2023. She is a seasoned healthcare executive with a record of success in transformational leadership positions. Her strategies and creative solutions have earned her the reputation as being a positive change agent for small to mid-size hospitals.

For the past 20 years, Segar-Miller has gained considerable expertise supporting a portfolio of national and international clients. Her experience includes tenure as principal for Spectrum Health Partners in Franklin, TN; executive consultant for Bon Secours Mercy Health in Portsmouth, VA and Norfolk, VA; as Chief Executive Officer for Lock Haven Hospital in Lock Haven, PA and as CEO for Ashland Medical Center in Ashland, PA.

Segar-Miller is a registered nurse and earned her graduate degree in Health Services Management Services and Policy from New School University in Middletown, NY.

Vice President, Medical Affairs | Chief Medical Officer


Dr. Smith serves as the Vice President of Medical Affairs and Chief Medical Officer for St. Mary’s Health System. In these roles, he provides leadership to the medical staff of St. Mary’s Regional Medical Center and oversight to the care provided throughout the health system.

Doug has been part of St. Mary’s since 2001. In addition to being a practicing primary care physician, he has served in multiple leadership capacities prior to assuming his current roles in 2020. Before joining St. Mary’s, he practiced in Shrewsbury, Pennsylvania as part of WellSpan Health System.

Doug, his wife and two children love having Maine as their home. He is a “Buckeye” by birth and education, having grown up in Ohio and graduated with his M.D. from The Ohio State University College of Medicine. He received his B.A. in Biology and Chemistry from Alfred University in Alfred, New York. After medical school, he completed his Family Medicine residency at York Hospital in York, Pennsylvania, where he served as Chief Resident.

Vice President of Patient Care Services and Chief Nursing Officer

Jill Rollins serves as Vice President of Patient Care Services and Chief Nursing Officer at St. Mary’s Health System. In her role she leads St. Mary’s nursing staff and oversees all aspects of care programs and initiatives to ensure patients consistently receive the highest quality clinical care.

Prior to joining St. Mary’s, she spent 35 years at Bridgton Hospital in Bridgton, Maine, with 20 years in various leadership positions, including Vice President of Nursing and Patient Care Services, Director of Nursing and Patient Care Services, Inpatient Nurse Manager and Emergency Department Manager.

“I’m honored to join the St. Mary’s nursing and clinical teams to help ensure we’re always striving to improve the quality, safety and delivery of patient care,” said Jill about joining St. Mary’s.

Jill holds a Master of Science in Nursing, Leadership and Management from Western Governors University in Millcreek, Utah and a Bachelor of Science in Nursing from St. Joseph College in Standish, Maine.

Vice President, Integrated Medical Group Practice Operations

Melissa Caccamo is the Vice President of Practice Operations at St. Mary’s Health System’s Integrated Medical Group. With over two decades of experience in healthcare management, Melissa brings a wealth of knowledge and expertise to her role.

Before joining St. Mary’s, Melissa spent nearly 15 years at Central Maine Healthcare in Lewiston, Maine, where she held various leadership positions. Her roles included Vice President of Medical Group Operations and Innovation, Vice President of Primary Care, Medical Specialties, and Cardiovascular Services, and System Director of Ambulatory and Retail Services. Melissa’s dedication to operational excellence and innovation in healthcare delivery is evident in her track record. Her leadership and strategic vision have consistently driven improvements in patient care and organizational effectiveness.

In addition to her extensive professional experience, Melissa is a certified medical practice executive (CMPE), further demonstrating her commitment to excellence in healthcare management. With her wealth of experience, leadership skills, and dedication to improving healthcare delivery, Melissa is a valuable asset to St. Mary’s Health System and the community we serve.

Director of Employee Experience


Brenda is the Director of Employee Experience at St. Marys’ Regional Medical Center. She joined the St. Mary’s HR Team in October 2018 as a HR Partner after more than three decades in a management role in the Retail Industry.

In addition to her work experience, Brenda has a BS in Business Administration, a BA in Psychology, a graduate certificate in HR, and a Masters in Organizational Leadership, as well as HR certification from the Society for Human Resource Management (SHRM-CP).

Brenda represents St. Mary’s on the United Way Board of Directors and serves on their Health Impact Council as well.

Brenda and her husband have two grown children and reside locally with their rescue pup, Brady. When she’s not working she enjoys spending time with family and being at the beach.

President and Administrator – d’Youville Pavillion

Marissa holds a nursing degree from Clarkson College in Omaha, Nebraska, and a Nursing Home Administrator’s license. With over 30 years of experience in geriatric nursing, she has been with St. Mary’s for more than two decades. During her tenure at d’Youville Pavilion, Marissa has held various roles, including staff nurse, nurse manager, director of nursing, and assistant administrator. In her spare time, she enjoys walking in the park and gardening. Marissa takes great pride in her role and in every staff member at d’Youville Pavilion, appreciating their passion, commitment to patients and residents, and dedication to living the mission every day.

(207) 777-8100
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