Known for his controversial work on the Star Trek franchise. He also wrote for 24 and Terra Nova, the short-lived Steven Spielberg TV drama.
He wrote his first script for Star Trek: The Next Generation as an intern in 1990. He was nominated for a Primetime Emmy in 1994 for Outstanding Drama Series for Star Trek: The Next Generation and won a Hugo Award for Best Dramatic Presentation in 1995 for All Good Things..., the TNG series finale.
His work after TNG for the franchise often raised the ire of fans, especially some of the creative decisions that were made for Star Trek: Voyager and Star Trek: Enterprise. So vitriolic was the fans' outrage that it took years before he and franchise runner Rick Berman felt comfortable speaking publicly with the fans.
He had a long-term relationship with actress Jeri Ryan.
He produced Terra Nova on which Stephen Lang played the role of Commander Nathaniel Taylor.