Seventeen has made three changes. Bethany Heitman has joined the magazine as executive editor, Betsy Fast joins as site director and Kaitlin Menza has been promoted to lifestyle editor.

Heitman comes to Seventeen from Cosmo, where she had been since 2004. She most recently served as features director.

Fast comes to the magazine from DoSomething.org, where she worked as the site’s editor-in-chief. Menza was most recently associate lifestyle editor.