Tim Vanderhook co-founded Specific Media in July 1999 when he recognized a need in the industry for an ad network that offered premium-site publishers and delivered efficient ROI results for advertisers.

Tim was largely responsible for creating the pop-under ad unit in 2001, when the dot com fallout began. Web publishers needed a new source of revenue to continue operating their companies and advertisers lost sight of the value traditional banners offered. The popular unit provided a large canvas for advertisers to deliver their messages and a new source of revenue for web publishers.

As the Internet ad industry continued to evolve and the pop under ad unit started to fade in popularity, Tim shifted the company's focus toward creating advanced user targeting technologies to support all standard IAB ad units.

Since 2002, he has developed one of the most advanced ad serving platforms in the industry, which gives advertisers the unique ability to serve ads to users based on demographic, behavioral, contextual and geographic data across the web's most popular brand publishers. Today, Specific Media's Premium Network boasts the biggest roster of brand publishers on the web with brand names such as Yahoo, Marketwatch, ABCNews, FOX Sports, MLB.com and virtually every other major media company.

Tim is responsible for the strategic direction of Specific Media and communicating the corporate mission to external audiences.