UnitedHealth has named a new boss almost two months after its then-chief executive Brian Thompson was shot and killed in New York. Company veteran Tim Noel will take charge of the largest health insurer in the US, which has more than 50 million customers, at a critical moment.

UnitedHealth Group on Thursday named Tim Noel, the head of its Medicare business, to the top job at its health insurance business, a month after the unit’s former CEO Brian Thompson was killed. Noel will take charge at UnitedHealthcare, the largest U.S. health insurer that provides benefits to more than 50 million Americans, at a critical moment.