The restructure has been carried out by new chief executive Olaf Swantee, who replaced Tom Alexander in July.
Pippa Dunn, who was previously vice-president of Orange propositions at Everything Everywhere, has been appointed to the newly created role of chief marketing officer, consumer.
Gerry McQuade, who was previously chief development officer for Everything Everywhere, is now chief marketing officer for non-consumer mobile, and acting chief sales officer until the end of 2011.
McQuade and Dunn will report to Swantee, as will Steven Day, chief of brand and communications, who is responsible for Everything Everywhere's brand campaigns.
Day is carrying out a similar role as before, but his job has changed from vice-president of brand communications, to chief of brand and communications.
McQuade's and Dunn's roles are geared more towards the pricing of Everything Everywhere's phones, both for its business and consumer customers. The pair will work heavily with Everything Everywhere's brand teams.
The restructure has prompted six departures including those of Richard Moat, chief financial officer and deputy chief executive, Andrew Ralston, chief commercial officer, and Nicolas Ott, vice-president of strategy.
Swantee said: "The structure of the team is function-oriented with clear accountability, so we can accelerate the execution of our key plans and priorities."
Everything Everywhere was formed on 1 July 2010 out of the merger of Orange and T-Mobile UK.
Prior to Alexander's departure in July, Taiwanese smartphone manufacturer HTC poached Everything Everywhere’s marketing chief Phil Roberson and made him executive director of HTC UK and Ireland.