Alexion, Treato shuffle staff

Rare-disease drug company Alexion has a new CEO—David Hallal, the company's current COO. Hallal has been with the company for 26 years and will replace co-founder and current CEO Leonard Bell as of April 1.

TripAdvisor's Christine Petersen has signed on to be Treato's Chief Consumer Officer and CMO. She will oversee the company's global marketing initiatives and consumer health business.


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