Scott Armstrong is president and CEO of Group Health Cooperative, one of the nation's largest consumer-governed health care systems. He has been with Group Health since 1986 in positions ranging from assistant hospital administrator to chief operating officer. He became president and CEO in January 2005.

Armstrong has more than 25 years of experience in health care and was the assistant vice president for hospital operations at Miami Valley Hospital in Dayton, Ohio, before joining Group Health. He received his bachelor's degree from Hamilton College in New York and a master's degree in business with a concentration in hospital administration from the University of Wisconsin–Madison.

Armstrong is a commissioner of the Medicare Payment Advisory Commission, board chair of the Alliance of Community Health Plans, and a board member of America's Health Insurance Plans and the Pacific Science Center. He is also a member of the Community Development Roundtable in Seattle and a fellow of the American College of Healthcare Executives.