Our Leadership
Rod Harkleroad
Market President, HighPoint Health System
Chief Executive Officer, Sumner Regional Medical Center
Rod Harkleroad, RN is the chief executive officer (CEO) of Sumner Regional Medical Center (SRMC). Harkleroad serves as market president of HighPoint Health System (HighPoint), which includes SRMC as well as Riverview Regional Medical Center (RRMC) in Carthage, Tennessee and Trousdale Medical Center (TMC) in Hartsville, Tennessee.
A seasoned healthcare administrator with significant operational and clinical experience, Harkleroad has served in diverse leadership positions in North Carolina and Tennessee. Prior to his role at SRMC, Harkleroad served as CEO of Frye Regional Medical Center (FRMC), a Duke LifePoint facility located in Hickory, North Carolina. He also previously served in the HighPoint market as CEO of RRMC and TMC and as associate chief nursing officer at SRMC.
Harkleroad earned a Bachelor of Science in Nursing from Western Kentucky University in Bowling Green, Kentucky, and a Master of Business Administration and Management from Vanderbilt University’s Owen Graduate School of Management in Nashville, Tennessee. In 2019, he was named one of Becker’s Hospital Review’s “60 Rural Hospital and Health System CEOs to Know.”
John Doyle
Chief Financial Officer, HighPoint Health System
John Doyle, CPA, is Chief Financial Officer (CFO) for all HighPoint Health System facilities, including the flagship Sumner Regional Medical Center in Gallatin. He has accrued a wealth of healthcare finance leadership across multiple states including Texas, Kentucky and South Carolina.
In 1999, Mr. Doyle was an original LifePoint Health employee as CFO at Logan Memorial Hospital in Russellville, Kentucky. He was impressed with the focus on quality of LifePoint Health, and is happy to continue his career building on the strong financial base at HighPoint, so that we may continue to expand essential health care services to the communities we serve.
Isabelle Garibaldi
Chief Nursing Officer
Isabelle Garibaldi, DNP, RN, NEA-BC, CENP, CPPS, is the Chief Nursing Officer for Sumner Regional Medical Center. Before her arrival at Sumner Regional, she served as CNO of Watertown Regional Medical Center, Watertown, WI., for six years.
Dr. Garibaldi received her Certification in Executive Nursing Practice in 2014 from the American Organization of Nurse Executives (AONE), as well as her Nurse Executive, Advanced, Board Certified credentialing from the American Nurses Credentialing Center.
She holds an undergraduate nursing degree from the University of St. Francis, her Master of Science in Nursing from Lewis University, and her Doctorate of Nurse Practice from Rush University.
Geoff Lifferth
Chief Medical Officer
Geoff Lifferth, MD, FAAEM, was born in Madison, Tennessee, and has worked in the Emergency Department at Sumner Regional for the last 15 years. He did his undergraduate work at Brigham Young University, medical school at UT Memphis, and his Residency in Emergency Medicine at the Harvard Affiliated Emergency Medicine residency, working at Mass General, Brigham and Women’s Hospital and Boston Children’s Hospital.
Dr. Lifferth is board-certified in Emergency Medicine and has served in multiple leadership positions in our hospital, including previously serving as the Chair of the Ethics committee, and as the Chief of Staff for two years. He is the former vice president of the Tennessee AAEM, and currently serves on the board of directors.
He and his wife Kate have five children. He is an outdoorsman who enjoys backpacking, sailing, running and spending time with family and the Boy Scouts. He is also fluent in conversational Japanese.
Assistant Administrators
Braxton Holloway
Assistant Administrator
Braxton Holloway is the assistant administrator for Sumner Regional Medical Center, providing operational leadership guidance to nine hospital-based departments, including the lab, outpatient cancer center, environmental services, Sumner Station, the wound care center, medical staff services and physician services.
Mr. Holloway provided leadership to the 18 physician practices of HighPoint Health System, which are responsible for more than 100,000 annual patient encounters, prior to becoming assistant administrator. He has been working in clinical settings, directing, planning, and supervising daily operations and special projects for nearly 16 years. He holds a Bachelor of Science degree in Healthcare Administration from Middle Tennessee State University.
His wife, Valerie, is a pediatric registered nurse, and they have three children together. He is a native Tennessean and grew up in Franklin. He and Valerie have lived in Sumner County for the past 6 years.