Meghan Fitzmartin started with Supernatural as executive assistant to showrunner Andrew Dabb in 2016. Her first writing credit on Supernatural is 14.15 Peace of Mind which she wrote the teleplay for and shares the story by credit with Steve Yockey. She was promoted to staff writer in November 2019.
Meghan co-hosts a podcast called "Wine and Comics" with Topher Harless (surprisingly about comics) and has written and produced an audio drama called Red Rhino about a high school boy who gets superpowers which are not that super. She also wrote an episode of DC Super Hero Girls.
- In 13.10 Wayward Sisters, the young girl Amanda Fitzmartin who is captured by werewolves and rescued by Claire Novak was named by writer Robert Berens in honor of Meghan.