Prior to Valiant, Greenbaum held the same title at Double Take, the publishing arm of video game company Take-Two Interactive. In that position, she oversaw the development of the comic titles Spring, Remote, Dedication, and Honor. Greenbaum also interned in social media marketing and worked as an assistant editor for the Ultimate Night of The Living Dead series at Double Take.
Greenbaum joined Valiant in February. In her new Associate Editor position, Greenbaum will work with Valiant Editor-in-Chief Warren Simmons and assist in the development and release of several Valiant titles, including Ninja-K, X-O Manowar, and Secret Weapons.