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Jeff “Swampy” Marsh

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Jeffrey “Jeff/Swampy” Marsh (born December 9, 1960) is a director and one of the writers of the Nickelodeon program Rocko’s Modern Life. Co-Creator of Phineas and Ferb with Dan Povenmire, he has directed, written, and acted in this Disney Channel Original Series. In Phineas and Ferb, he portrays the voice of Major Francis Monogram, the commander of Perry the Platypus. From the show’s inception, Swampy has been one of the main songwriters for the series, along with Dan Povenmire and Martin Olson.


  • Nominated along with Dan Povenmire for two Emmy awards: “Outstanding Original Main Title Theme Music” and “Outstanding Original Music and Lyrics” (for “Ain’t Got Rhythm”)
  • Nominated along with executive producer Dan Povenmire, director Zac Moncrief, et al., for the Emmy Award for “Outstanding Short-Formed Animation Program” for Phineas and Ferb (episode: “The Monster of Phineas-n-Ferbenstein”)


Phineas and Ferb Wiki-wordmark This page uses Creative Commons Licensed content from the The Phineas and Ferb Wiki. The list of authors can be seen in the page revision history (view authors). As with Disney Wiki, the text of The Phineas and Ferb Wiki is available under the CC-by-SA Free Documentation License.