Seth Aaron Henderson is the winner of the seventh season of Project Runway along with his model, Kristina Sajko.

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, Henderson was announced the winner of Project Runway: All Stars; 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.

He currently lives in Vancouver, Washington, with his wife, Tina, and two children, Aaron and Megan.