Seth Aaron also filled in for Tim Gunn as the head "casting judge" on Season 9 of Project Runway. Continuing his commitment to a sustainable future, Seth Aaron's designs feature organic fabrics and those made from recyclable plastic bottles. His 2010 Portland Fashion Week collection was sponsored and inspired by Solar World, a manufacturer of solar panels in Oregon, Henderson's home state.
Henderson's show at Portland Fashion Week in October 2011 also featured sustainable fabrics. and he's collaborating with the New Hampshire-based Earthtec clothing company to create a sustainable line of clothing to be sold by an "as yet unnamed national retail chain".
In 2013, Henderson became a contestant on Project Runway: All Stars (season 3). In 2014, he was announced the winner of the season; he is the first to win both Project Runway and Project Runway: All Stars. As part of his prize package, Henderson launched a collection on QVC later that year.
The two-time Project Runway winner is collaborating with Feetz to launch the world’s first 3D printed designer shoe line at FashioNXT Week on Oct 13th.
He currently lives in Vancouver, Washington, with his wife, Tina, and two children, Aaron and Megan.