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geek /gēk/ noun: a knowledgeable and obsessive enthusiast.

Hello and thanks for stopping by!

I provide high-quality, dynamic, believable voiceover that just might be perfect for your next Commercial, eLearning, Interactive, Animation or Narration project. Something else in mind that requires voiceover? Let's talk about it! 

If you're looking for thoughtful voiceover that hits the mark, let's discuss how I can help bring your next project to life.


...and yes, I am a total voiceover geek.

Jonathan Sleep, Voiceover


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  • Jonathan can be heard as the voice of Corporal Mann (ADR) on the Netflix hybrid animation series, The Liberator, produced by Trioscope Studios, Netflix/A&E.

  • Jonathan has recorded 30+ audiobook titles and has worked with Tantor Media, Graphic Audio and other authors, publishers, podcasts and other production entities.

  • Some of Jonathan's best know works are the "Reflections in Natural History" collections of essays written by world-renowned paleontologist and evolutionary biologist, Stephen Jay Gould, as well as the ongoing Caverns and Creatures series of LitRPG/Fantasy/Comedy novels and short stories written by Robert Bevan.

  • This best-selling series of 17 titles cumulatively has over 45,000 ratings on Audible and regularly tops Audible's charts in the Humor, Dark Humor, and Fantasy categories.

  • Jonathan has received personal coaching from industry veterans, Paul Cartwright, Thessaly Lerner and Brian Bremer, completed anime/ADR/video game intensive led by Chris Rager (Dragonball Z) has attended improv classes at Dad's Garage, and voiceover workshops and classes at Atlanta Voiceover Studio from Sally Neal and Steve Henderson.

  • Jonathan has worked in television and podcast production, editing, working in show development, coordination and production for School of Humans, producing content for A&E, [adult swim], Cooking Channel, FYI, Redbull TV, iHeart Radio. IMDB

  • He lives in the cozy North Georgia mountain town of Dahlonega with his wife, Kelly, and kids, Fletcher and Sydney.


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Home: The Studio


I record and produce from my personal pro-equipped studio. 

Here's some of the equipment I like to use: 5-Carat Recording Booth

MacBook Pro

Neumann TLM 107

Tech Zone Stellar X2

Universal Audio Apollo MK 2 Interface

a variety of digital preamps, compressors, plugins

Adobe Audition

Izotope RX

Zoom, Skype, Source Connect




  • Remus: The Mad Bootleg King - 3 Characters (iHeart Podcasts, School of Humans)


  • Corporal Mann, The Liberator, (Jonkajtys, 2020)


  • Political Choice in a Polarized America

  • Wonderful Life: The Burgess Shale and the Nature of History

  • Ever Since Darwin: Reflections in Natural History

  • The Panda's Thumb: More Reflections in Natural History

  • Bully for Brontosaurus: Reflections in Natural History

  • The Flamingo's Smile: Reflections in Natural History

  • Hen's Teeth and Horses Toes: Further Reflections in Natural History


  • The Founder: Mirror World Book 5

  • Conjured Darkness: Six Macabre Tales

  • Ikarion Gate: Book 1 of the Ikarion Isekai Anime Series 

  • Boarded Windows, Dead Leaves

  • Klaus Encounters: The Legend of Klaus Richter 

  • The Relativist: Occupational Hazards, Book 2

  • Critical Failures

  • d6: A Caverns and Creatures Mini-Adventure Collection

  • Critical Failures II:  Fail Harder

  • 2d6: A Cavern and Creatures Mini-Adventure Collection

  • Critical Failures III: A Storm of S-Words

  • 3d6: A Cavern and Creatures Mini-Adventure Collection

  • Critical Failures IV: The Phantom Pinas

  • 4d6: A Cavern and Creatures Mini-Adventure Collection

  • Critical Failures V: V is for Five

  • 5d6: A Cavern and Creatures Mini-Adventure Collection

  • Critical Failures VI: The Good, the Bad, and the Neutral

  • 6d6: A Cavern and Creatures Mini-Adventure Collection

  • Critical Failures VII: Septapussy

  • 7d6: A Caverns and Creatures Mini-Adventure Collection

  • Critical Failures VIII: Galleons of Sea Men

  • 8d6: A Caverns and Creatures Mini-Adventure Collection

  • Critical Failures IX: No Holds Bard


"...I’m writing this review mostly to comment on how amazing Jonathan Sleep is as a narrator / producer. Book eight was pretty impressive but good grief he’s just so good at this." - rsr666

"All I can say is "WOW!" ...Ok, maybe a little bit more than, "WOW!" As a player of Dungeons and Dragons for 38 years, I knew I was going to enjoy this book series, and it did not disappoint. What I didn't know is that the narrator would blow my mind. I've never heard a single book on audible with this kind of voice range. I thought there were multiple people narrating the book. I will definitely be looking for more books read by this man" - John C.

"...Jonathan Sleep knocks this one out of the park. I don't know how many takes he has to do to keep from laughing so hard." - ATarker

"...As ever Jonathan Sleep’s fantastic and ridiculous narration brings it all to ribald life. Can’t wait for the next Critical Failures book?" - S. Donnelly

"Funny and engaging. This was one of the best narrators I've heard. The cast of characters was constantly growing and each new character sounded distinct. In many cases, a character voice would change in some way and it was the narrator doing a voice doing a voice -- and he nailed it." - some person on the internet

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