Last month’s assassination of United Healthcare CEO Brian Thompson sparked a new wave of anxiety for corporate leaders, prompting many executives to think twice about their safety and reevaluate their existing security protocols.

Tim Noel joined the company in 2007 and was most recently the head of its Medicare and retirement unit.

UnitedHealth Group has named long-time executive Tim Noel as the new chief executive for its massive UnitedHealthcare health insurance business. The announcement Thursday came a little more than seven weeks after the Dec.