American television producer and writer for Marvel and DC Comics. He co-created the show Eli Stone and has served as the showrunner for Arrow.
He worked as an intern for Marvel Comics in 1990. He also worked as a lawyer in Boston, Massachusetts for five years.
He wrote the comic Young X-Men and the script for the video game X-Men Origins: Wolverine.
He grew up with his family in Long Island, New York. His brother Eric is also a screenwriter.