Today, innovation is almost always supported—if not driven—by technology. No stranger to this rule is Todd Park, who in March ended a three-year stint as chief technology officer (CTO) of the US Department of Health and Human Services (HHS) to take on the role of CTO of the United States. In this interview—part of a series of articles from McKinsey’s public-sector practice (for more, see sidebar, “About this series”)—Park explains how he has tried to find creative ways to use IT and data to benefit the public. Among his achievements at HHS were the launch of programs such as the consumer Web site HealthCare.gov and the Health Data Initiative, which encourages the development of innovative applications using publicly available government data. McKinsey’s Eric Braverman and Michael Chui recently met with Park in Washington, DC, and asked him about his plans for accelerating innovation in the US government.