In addition to Quinto, Holdren has worked with such Star Trek alumni as Catherine Hicks and Iman. Other talent he has worked with include Cate Blanchett, Zach Braff, Danny Glover, Green Day, Michael Jordan, John Mellencamp, and Arnold Schwarzenegger. Holdren did hair and makeup for R. Kelly's music video "Angel." She also worked with the Dixie Chicks on their video, "Goodbye Earl." In addition, he was an assistant hair stylist on the acclaimed television series Jericho for CBS Paramount Network Television. He also held that same position on the hit ABC series Chuck, which stars Tony Todd.