Dr. O’Shaughnessy leads Catholic Health, a major health system serving Long Island and New York State, bringing to the role decades of experience in clinical care, leadership, strategy and operations that began with his career as an emergency department physician. He was appointed president and CEO in 2021 after serving in multiple senior leadership roles within the system, including executive vice president, chief medical officer and chief clinical officer. Since, he has focused on expanding Catholic Health’s reach, enhancing patient care, and pioneering new approaches to health care delivery and community health improvement. Under his leadership, Catholic Health has launched programs that provide nutritious food and tailored health education to at-risk individuals, grounded in a recognition of food as medicine, while also driving a progressive population health strategy focused on preventive care, digital innovation, and advanced primary care to detect and address disease earlier. As a recognized industry leader at the state level, Dr. O’Shaughnessy has strengthened New York’s healthcare system by securing increases in Medicaid reimbursement, expanding access to capital for safety-net providers, and helping prevent harmful policy proposals that would have threatened innovation and quality care. He serves as chair of the Healthcare Association of New York State and immediate past chair of the Greater New York Hospital Association. Additionally, he sits on the board of the New York Institute of Technology. Dr. O’Shaughnessy was named a “Top 100 Long Islander” by Long Island Business News in 2025 and has been recognized as a “Top Business Influencer” by the publication for three consecutive years.
