A man once berated by lawmakers for massive Obamacare failures is now leading the agency that guides its implementation.

When Marilyn Tavenner steps down from the Centers for Medicare and Medicaid Services at the end of February, former technology executive Andy Slavitt will take her place as the head honcho overseeing the Affordable Care Act’s major components. Slavitt joined CMS as second-in-command last June to help improve HealthCare.gov before year two of enrollment.