Angela Chewning, Senior Vice President, Human Resources at Dayton T. Brown, Inc., and John Rizzo, PhD, a professor of Economics and Preventive Medicine at Stony Brook University, have joined the Advisory Board at Northwell’s Mather Hospital, the hospital announced.
“I’m pleased to welcome Angela Chewning and John Rizzo to the Advisory Board” said Kevin McGeachy, President, Mather Hospital. “As industry leaders and highly respected supporters of Mather Hospital, Angela and John bring skills, experiences and unique perspectives to the board – all in the name of reimagining health and elevating care in our community.”
Ms. Chewning joined Dayton T. Brown, Inc. in 1981 as a Benefits Administrator and has been a driving force in the company’s Human Resources department ever since. Over the years, she has served as Human Resources Assistant, Employment Manager, and Human Resources Manager. In 1997, she was promoted to Vice President and Director of Human Resources, and she now serves as Corporate Senior Vice President ,Human Resources.
Ms. Chewning holds a bachelor’s degree in business administration from Dowling College, a New York State Advanced Certificate in Labor/Management Studies, and a master’s degree in industrial and labor relations from SUNY Stony Brook. She also serves as Chair of the Suffolk County Workforce Development Board.
Dr. Rizzo is a professor of Family, Population, and Preventive Medicine at Stony Brook University. A health economist, his research interests include applied microeconomic studies of physician and pharmaceutical markets, the application of econometric methods to clinical outcomes research, and pharmacoeconomic evaluations of medical treatments and technologies.
From 2013 until 2022, Dr. Rizzo served as Chief Economist at the Long Island Association, where he monitored the Long Island economy, preparing monthly economic reports and conducting additional research studies of various sectors of Long Island’s economy. Dr. Rizzo has published more than 250 articles in peer-reviewed academic journals. He consults for leading healthcare and government organizations and has testified as an economics expert in cases involving the pharmaceutical and hospital industries. He received his PhD and MA in economics from Brown University.
About Mather Hospital
Mather Hospital is an accredited 249-bed, non-profit community teaching hospital dedicated to providing a wide spectrum of high-quality health care services to Suffolk County residents, showing compassion, respect and treating each patient in the manner we would wish for our loved ones. Mather received its third top five-star rating from the Centers for Medicare & Medicaid Services for outcomes, patient experience and process and the prestigious Magnet® recognition three times from the American Nurses Credentialing Center for quality patient care, nursing excellence and innovations in professional nursing practice. The hospital was rated high performing by U.S. News & World Report 2025-2026 Best Hospitals rankings in two medical specialties of gastroenterology and GI surgery and pulmonology and lung surgery, and for congestive heart failure, kidney failure, and pneumonia. Mather also was named one of America’s 250 best hospitals for 2023, 2024 and 2025 by Healthgrades and in 2025 received Healthgrades’ Outstanding Patient Experience Award™ for the fifth consecutive year. Our Graduate Medical Education program prepares physicians for future careers through Internal Medicine, Transitional Year, Diagnostic Radiology, Interventional Radiology, Psychiatry and Pharmacy residency programs and gastroenterology and hematology/oncology fellowships. For information about Mather Hospital, visit matherhospital.org or follow us @MatherHospital on Facebook.
About Northwell Health
Northwell is the largest not-for-profit health system in the Northeast, serving residents of New York and Connecticut with 28 hospitals, more than 1,000 outpatient facilities, 22,000 nurses and over 20,000 physicians. Northwell cares for more than three million people annually in the New York metro area, including Long Island, the Hudson Valley, western Connecticut and beyond, thanks to philanthropic support from our communities. Northwell is New York State’s largest private employer with over 104,000 employees – including members of Northwell Health Physician Partners and Nuvance Health Medical Practices – who are working to change health care for the better. Northwell, named a TIME100 Most Influential Companies 2025, is making breakthroughs in medicine at the Feinstein Institutes for Medical Research. Northwell is training the next generation of medical professionals at the visionary Donald and Barbara Zucker School of Medicine at Hofstra/Northwell and the Hofstra Northwell School of Nursing and Physician Assistant Studies. For information on our more than 100 medical specialties, visit Northwell.edu and follow us @NorthwellHealth on Facebook, X, Instagram and LinkedIn.