Mr. Brennan is the President and CEO of the Health Care Cost Institute. In this role, he is responsible for overseeing HCCI’s overall research agenda that seeks to highlight trends in U.S. health care spending and the factors behind those trends. Niall also works to maximize the reach of HCCI's data by licensing directly to leading academic researchers and through HCCI's role as a Medicare certified Qualified Entity. Niall works closely with federal and state policymakers, including the U.S. Congress on key health policy issues. He is a nationally recognized expert in health care policy, the use of health care data to enable and accelerate health system change, and data transparency. He has published widely in leading academic journals, including the Journal of the American Medical Association, the New England Journal of Medicine and Health Affairs. Prior to joining HCCI, Mr. Brennan was Chief Data Officer at the Centers for Medicare and Medicaid Services (CMS). He has also worked at the Brookings Institution, the Medicare Payment Advisory Commission, the Congressional Budget Office, the Urban Institute, and PriceWaterhouseCoopers. Mr. Brennan received his MPP from Georgetown University and his BA from University College Dublin, Ireland. When not in the office, Niall enjoys spending time with his family, watching soccer and rugby, and road and mountain bike riding.