More details about their roles on V below, from Airlock Alpha:
John Wirth and Natalie Chaidez are the newest additions to the "V" staff, making the move from "Terminator: The Sarah Connor Chronicles" where Wirth was an executive producer and Chaidez was a co-executive producer. An ABC spokesman has confirmed that Chaidez will become a co-executive producer of "V" while Wirth will serve as a consulting producer.
Sources say the two are expected to be a huge boost to the show's writing team, and signal what could be continued confidence in the long-term vitality of "V" by ABC.
Wirth and Chaidez do bring impressive resumes to the table. Chaidez wrote four episodes of "Sarah Connor," which was canceled by Fox last season. She also was a co-executive producer for NBC's "Heroes" in 2006 and 2007 writing the episodes "Better Halves" and "The Fix." Other shows she worked on include "Judging Amy" and "New York Undercover."
Wirth has been a key part of several popular shows over his career including "Sarah Connor," "Ghost Whisperer," "Nash Bridges" "Picket Fences" and "The District." He wrote four episodes of "Sarah Connor," including the popular episode "The Turk."