After Valiant, he then moved on to Marvel Comics, where he drew Iron Man for over three years. His other works include Wolverine, Elektra, and the maxi-series X-Men: The End.
Chen also lends his talents to Marvel's Creative Services Division where he contributes to style guides and licensing art, including box cover illustrations for the Iron Man video game and various promotional items such as lunchboxes, T-shirts and posters.
Currently, Chen is the regular artist on the monthly Nova series from Marvel. Aside from comic books, he applies his creative talents by designing furniture and home renovations, specializing in kitchens and molded concrete countertops. He has also started a new line of designer toys and figurines.