"Although this news may feel sudden to some, this transition has been in progress since late last year and while I won't be present day to day at Nest, I'll remain involved in my new capacity as an adviser to Alphabet and Larry Page," Fadell wrote. Fadell has been under fire since a founder of Dropcam, another Alphabet acquisition that Fadell was put in charge of, publicly took him to task following reports that more than half the Dropcam team had left. Earlier this week, a complaint from a former employee to the National Labor Relations Board became public, reigniting the controversy. Fadell will be replaced by Marwan Fawaz, who led the Motorola business when it was owned by Google.