Complex sentence: Prominent among those named in the list was Leon Wieseltier, contributing editor and critic at "The Atlantic" until October 27,2017, when the magazine terminated his employment due to allegations of sexual harassment.
Split into simpler sentences: Prominent among those named in the list was Leon Wieseltier, contributing editor and critic at "The Atlantic". On October 27,2017, the magazine terminated his employment due to allegations of sexual harassment.