Matt Seiler Is Out to Remake and Automate the Media Agency World

Mediabrands CEO has a penchant for reinvention

Facebook global sales chief Carolyn Everson knew to brace herself for some hair-raising skiing in the Utah mountains with Matt Seiler, a weekend guest of hers at this year’s Sundance Film Festival. When the two skied together previously, the Mediabrands CEO always sought out the toughest trails—whether Everson was ready for them or not.