American user interface designer and product manager. Frequent speaker at conferences, is a recognised authority on UI design and product design and management. Writes in Felt Presence about these topics. Has been working at Basecamp since 2003, playing a significant role in the conception and interface design of subsequent products including Backpack, Campfire and Highrise. In 2011 worked closely with the partners to re-imagine the Basecamp product from the ground up, managing development from start to finish and defined core interface elements.