Mercy Health Services Leadership

David N. Maine, M.D., is the President & CEO of Mercy Health Services (MHS), an independent, mission-driven health system serving the greater Baltimore area. Mercy Medical Center, founded by the Sisters of Mercy in 1874, is a general acute care teaching hospital affiliated with the University of Maryland School of Medicine. Appointed President & CEO in January 2020, coinciding with the onset of the COVID-19 pandemic, Dr. Maine became the first physician to lead the hospital in its nearly 150-year history. Under his leadership, Mercy adeptly navigated the pandemic's challenges, ensuring both the continuity of essential services for the community with an unwavering commitment to safety and patient care.

Dr. Maine has led the health system's continued growth and transformation by introducing new clinical programs and expanding Mercy’s network of primary and specialty care providers and locations throughout the Baltimore region. Mercy remains a beacon of hope and healing in Downtown Baltimore, bolstered by continued investment in Mercy's renowned Centers of Excellence, and by enhancing maternal health and preventive care programs to improve community health. In furtherance of Mercy's patient-centered mission of compassionate care, Dr. Maine has prioritized enhancing access and patient experience while strengthening employee engagement and culture, contributing to Mercy earning national recognitions, such as being named one of America's 50 Best Hospitals for Surgical Care by Healthgrades, and being named a Top U.S. Workplace for Women by Newsweek.

Prior to his appointment as President & CEO, Dr. Maine served as Executive Vice President for Mercy Health Services, where he was responsible for all MHS operations, overseeing the Medical Center, specialty and primary care physician networks, and Mercy affiliates. He also served as Executive Vice President of Mercy’s Physician Enterprise, focusing on the growth of its physician network. His other roles at Mercy have included serving as President of Medical Staff and as Senior Vice President of Clinical Transformation, leading Mercy’s efforts to expand ambulatory surgical services. Since 2007, Dr. Maine has also served as Medical Director of The Center for Interventional Pain Medicine at Mercy, perennially earning the distinction as a Baltimore magazine “Top Doctor”.

Dr. Maine lives in Pikesville, Maryland with his wife and two children. He was born the son of Jewish-Iraqi refugees who fled Iraq for Europe in 1972 due to the ongoing persecution of the religious minority. With the assistance of the Hebrew Immigrant Aid Society, an international refugee aid organization, Dr. Maine’s family eventually immigrated to the United States, settling in Rochester, New York in 1974.

Dr. Maine attended local public schools in Irondequoit, New York. He then matriculated at the University of Rochester School of Arts and Science and the University of Rochester School of Medicine, graduating in 2002 with Alpha Omega Alpha honors. He completed his Residency in Anesthesiology and his Fellowship in Interventional Pain Medicine at The Johns Hopkins Hospital and is Board Certified in Anesthesiology and Pain Medicine. He earned his MBA from The Johns Hopkins Carey Business School.

Dr. Maine is the Chair of the Maryland Hospital Association’s Council on Clinical & Quality Issues and also serves on the association’s Board of Trustees. Dr. Maine also serves on the board of the Greater Baltimore Committee. In 2024, he was named Business Leader of the Year by Loyola University Maryland. He was earlier recognized as a Grassroots Champion by the American Hospital Association and was named a top Maryland healthcare leader by The Daily Record.

Mercy Health Services Senior Leadership Team

David N. Maine, M.D.
President &
Chief Executive Officer

Philip W. Beatson
Senior Vice President
Strategy & Corporate Operations

Sedalia E. Brull
Chief Nursing Officer &
Vice President of Patient Care Services

Justin C. Deibel
Executive Vice President &
Chief Financial Officer

Susan D. Finlayson
Senior Vice President
Operations

Crystal L. Hickey
Executive Director
Stella Maris, Inc.

Tammy L. Janus
Senior Vice President
Human Resources 

Reverend Thomas R. Malia
Assistant to the President for Mission

Karen B. Mathura
Chief Compliance Officer

Michael C. Mullane
Senior Advisor to the CEO

Thomas R. Mullen
President Emeritus
President & CEO, 1999-2020

Ryan C. O'Doherty
Senior Vice President
External Affairs 

Elinor J. Petrocelli
Senior Vice President
Finance 

Wilma A. S. Rowe, M.D.
Senior Vice President, Medical Affairs &
Chief Medical Officer

Claudine Schiro-Baker
Senior Vice President &
Chief Information Officer

Caroline W. Senatore
Senior Vice President
Chief Philanthropy Officer

Christopher G. Thomaskutty
Senior Vice President
Physician Enterprise